Prof. Dr. LewyAuthor
Dear Viqueen, even if you are not particularly interested in the topic (according to your own statement, you "don't care much"), you have made a contribution to the topic. Therefore it is normal that someone contradicts you, even if you are still not interested in the topic. Paradoxically, a lack of interest has a certain advantage: if the discourse partner has the better arguments, it should be easier to accept them.
1) Your first argument is, that bigger worker coops "probably will do anything to keep down their smaller competitors (other co-ops) and would effectively prescribe government policy."
Your argument is a theoretical one. Carefully you have added a relativizing "probably".
In the first step I would like to stay on this theoretical level. Your argument, even if it was true, is not an argument against Worker Coops as opposed to capitalist private property. Under capitalist conditions, large companies and corporations also do everything to keep down their smaller competitors. The Worker Coops would therefore not be a step backwards on this issue in relation to capitalist conditions. However, they would still have the advantages I mentioned above, such as democracy in the workplace, more income equality, less concentration of power.
And now, I would like to answer your objection by taking a look at reality. (Speculative answers, usually recognizable by terms such as "probably", have to backtrack if the answer can be found in practice.)
Mondragon, the Worker Coop from Spain I mentioned earlier, is a network of many Worker Coops. Some are bigger, some smaller. It is important to know that the cooperation between them is offered in the regulations and statutes of the cooperative. A separate university and 15 technology parks were founded, whose research results and teaching are equally available to all associated Worker Coops. There is a joint bank that passes on the deposits of some to the others as low-interest loans. As soon as a Worker Coop gets into economic difficulties, the other Worker Coops have to help him according to certain specifications. For example, "surplus" workers from a troubled Worker Coop are integrated into the production processes of the other Worker Coops. During the great crisis since 2008, Mondragon has not fired a single worker.
All this means that whether or not larger Worker Coops suppress the smaller Worker Coops depends on the rules and statutes of the organization. The fact that this can lead to solidarity in practice has been proven by reality. In any case, there is more solidarity here in the relationship between the larger organisations and smaller organisations than in capitalist competition.
The Replica to your second answer will follow as soon as possible.