Worth noting that is completely legal in the USA and even encouraged by the tax code. They are called ESOPs (Employee Stock Ownership Program). An ESOP configured as an S-Corp that is 100% employee owned pays no federal business tax. Some examples of well known ESOPs in the US are Wawa, Bob's Red Mill, and W. L. Gore & Associates (makers of Gore-Tex).

Employee stock ownership is a leap forward and studies consistently highlight its economic benefits.

However, Mondragon, and co-ops like it, go further. They are industrial democracies: one worker, one vote.

Well, sort of. Technically speaking, S-Corps by definition pay no federal income tax since they're pass-through entities. If the sole shareholder of an S-Corp was an ESOP, the income is passing through to it. The ESOP has beneficiaries (the employees) whose shares sit in a trust. Income to the ESOP isn't taxed at the moment of filing, it's deferred: when the beneficiaries take distributions according to their shares, they pay ordinary income tax in that year.