It depends.
Co-ops have many attractions, but they typically operate within a narrow range of concerns and capital requirements.
(Note that this answer is more concerned with producer-led coops than consumer ones)
First, let's compare them with an individual entrepreneurship:
they can access the same financing mechanisms like bank loans and their financial asset pooling has benefits. Bonds could be arranged.
they need several people to initiate (duh!). This means that someone with an innovative idea can't start a coop without convincing others.
in both, people have their skin in the game. if it fails...
they don't depend on individual leadership and avoid succession risks.
Let's also look at some of the biggest players, from one of their own viewpoints:
Most enterprises in the Top 300 by turnover are producer co-ops, mainly representing agricultural and retailers’ co-ops (126, to which is added one producer/consumer), followed by mutuals (84) and consumer/user co-ops (71). Eleven of the top 300 are non-co-ops controlled by co-ops, while only five are worker co-operatives and two are multi-stakeholder.
The results are similar in the Top 300 based on turnover over GDP per capita, but there are more consumer/user co-ops than mutuals, respectively 84 and 67 organisations. The countries with the most enterprises in the top are USA (71), France (42), Germany (31) and Japan (22).
What seems to come out is that they are suited for cases where:
- business growth can be slow and organic
- aggregated smaller business assets: shops, farms, banks, insurance, housing (though seed capital is often provided to kick start coops in housing).
- these are going businesses.
- owner skill requirements are either uniform or not very high (note: I am sure this is a factor, but I don't think I am expressing it well, suggestions welcome).
- the product is known and will have cash flow from early on.
On the other hand, Filthy Lucre: Economics for People Who Hate Capitalism - Wikipedia tended to largely dismiss them as the solution, stating that, while they work great in some fields they can't replace more traditional approaches in many others.
So let's look at why the model might be unsuitable for some cases:
Immediate large scale capital requirements for a new, uncertain venture. How are you going to start up Tesla, with the massive investments needed for a new factory, and how will worker-owners pay their bills until they have something to sell?
Transformative businesses. Let's say its the 1950s and you have an idea to make electronics from integrated circuits. Your current company doesn't believe in it, it requires a lot of money and, while you can find fellow engineers to work in it as a startup, they don't have the cash for large scale capital investments. Unlike the Tesla example, no one has ever made this product so a bank won't talk to you. How about Moderna and its RNA-based vaccines? Many highly paid researchers, heavy capital investments, years of navigating health regulations and medical tests. Without any revenues.
Even in fields like agriculture, not all is suited for coops. Embrapa in Brazil is very good at doing cutting edge research for farmers. But it is state owned, not a coop. How would say a centralized coop for all farmers allocate between research for soy vs for beef? How much can a farmer contribute, personally, to DNA sequencing to identify drought-resistant crops, across multiple crops?
Skin in the game. Unlike share-based corporations or venture capital, owner-workers do not spread their risks. They invest their savings and their wages. This is the opposite of financial diversification. Again, quite possible in well-known fields of businesses with workers that know it and can provide equity via sweat. But less attractive on a new venture - there is it is much better to find people who have money and can afford to lose many little bits of it and recoup their losses on success. Far as I know, that is how capitalism got started, financing spice runs to the East Indies in the UK and Holland: individual owner-operators could not afford to have limited ships lost, but shareholders that spread their risks over many ships could.
Last, their decision making is by its very nature, distributed. They can't "pivot" to new business ventures as easily as an individual-owned or public company. Nokia used to be mostly a wood and paper product company, before going into printers, monitors then into smartphones. Hard to see a coop version of it doing that (no, no need to remind me of what happened to Nokia, but it doesn't detract from their innovation at their highpoint).
I am not saying coops can't work.
Nor that their use shouldn't be explored more aggressively over sole reliance on more traditional financing models.
Take WeWork, a business which managed to sell to gullible investors the notion that they had "digitalized" what's inherently a bricks-and-mortar, old-fashioned business: office space rentals. In as far as they innovated anything - which is doubtful - grouping together with existing small office leasing companies might have provided for a much more disciplined, realistic, business model than burning through investors' cash by a mercurial and undisciplined CEO.
One might also envision a coop-initiated Uber. The base capital investments aren't that high: a few smartphone apps, a server, individual car owners - it could spread from city to city, slowly. However, it might still struggle with investor-driven competitors, once it has established that there is a valid business model.
Coops sidestep the succession issues inherent to family firms. And they avoid the often inefficient allocation of resources from government-led investments where bureaucrats and politicians pick winners in fields they don't know well. They could also work well in financing multi-family housing, avoiding the pitfalls of government-owned subsidized housing that residents have little incentive to take care of, while also avoiding the speculation inherent in the sector.
They may also be attractive to developing countries with less mature local stockmarkets. And they could also dovetail neatly with Muslim constraints on interest payments.
Too gloomy? Read between the lines in the citations below.
Making this work is a challenge, even in fields that are coop-appropriate.
The cooperative capital constraint revisited
Our findings are mixed. While cooperatives in our sample have significantly lower debtto-asset ratios than comparable IOFs, we do not find evidence that they face financial constraints,
at least in the short run. However, for financing long term assets, our data suggest that
cooperatives tend to rely more on equity capital, which may reflect a constraint on borrowing
Can co-ops compete ... in capital? | Guardian sustainable business | The Guardian
There are in fact two problems around capital which co-operatives have to wrestle with. The first is that co-operatives cannot access equity capital (money put in by shareholders) – or at least, not normally. Equity is valuable for businesses because it does not show up on balance sheets as a liability, the argument being that shareholders would ultimately forfeit their whole investment if things go wrong.
The search for equity has led some foreign co-operatives to voluntarily choose the route now followed perforce by Britain's Co-operative Bank, typically by creating Public Limited Company (PLC) structures which co-ops partly own but which also have external investors.
Approaches like this immediately come up against the second big difficulty. How can you ensure that external investors do not eradicate the very thing that makes co-ops distinct, the fact that they are run by and for their members? As the ICA puts it, how can co-operatives find capital in ways which don't at the same time compromise the principle of member control and democracy?
When Co-ops and Venture Capital Meet | Media Economies Design Lab | University of Colorado Boulder
It is a common assumption that cooperative business and venture capital financing don't mix. And there is good reason for this. Venture capital uses investor ownership to drive companies toward a quick, value-maximizing exit. Co-ops, in contrast, are designed to be owned by their participants rather than outside investors, prioritizing social value over the long term. But that assumption may be worth reconsidering. In April, Savvy Cooperative announced that it had struck an investment deal with Indie.vc, a pioneering venture firm. Both Savvy and Indie.vc pushed the boundaries of their respective structures to make this happen, while keeping those structures intact.
I don't think coops are incompatible with a free market economy and they do not equate to socialism. In fact, when there is a need for government intervention to correct market failures, coops are likely one of the better actor types to provide subsidies to, as they can be more closely aligned to their members' and customer's needs:
US electric co-ops plan to build rural broadband infrastructure
Around 200 of the 900 co-ops affiliated to the National Rural Electric Cooperative Association (NRECA) are already providing or building out broadband. Another 200 more are assessing the feasibility of providing service to over six million households in co-op service areas that don’t have access to high-speed Internet service. The Fiber Broadband Association (FBA) estimates that rural electric co-op providers currently deliver fibre broadband to around 675,000 homes.
Contrast that with giving the - greedy and dishonest - US telecoms corporations more money. Or expecting municipal governments to provide expert ISP services.
To conclude:
Coops work well, under many conditions. However, as per this question, much as some anti-capitalist activists would like to claim they could largely/entirely replace corporations - while avoiding the likes of discredited 5 year plans - coops seem to work better under some conditions than others. And have, in practice, seen relatively limited uptake - again mostly limited to specific domains, despite their supposed advantages.
p.s. I agree you would get better answers on SE.Economics. However, picking one economic model over the other is a matter for voters to decide. So would a drive to change regulations to facilitate the uptake of coops where appropriate.