The approach I take is to create a production or revenue sharing "Capital Partnership" between the "Investor" Members or "Capital Providers" and the users of Investment, with any productive asset being held by a "Custodian".
ie a "Cooperative" of Investors in a revenue or production sharing partnership with a "Cooperative" of users of investment.
Or for the Marxists among us, Labour working with not for Capital.
Long time service and/or "savings" may allow the acquisition of any such "nth's" / Units or "Capital shares" (ie rights to revenues) but IMHO in order to be consistent with Cooperative principles, it would not matter how many Units you have, you only get one vote.
There are no "dividends" per se: the revenues simply "pass through" the LLP framework to the members, albeit members could agree that an amount would be held by a "custodian" by way of reserve. "Any economic unit can emit money. The serious problem is to get it accepted" Hyman Minsky
IMHO in order to be consistent with Cooperative principles, it would not matter how many Units you have, you only get one vote.
I agree. If a person wants to purchase more Units that's their relationship with the operational side of the co-op. Management and Control issues should be decided by the members and workers - if the latter aren't also the former - based on the Industrial Democratic ideal. Besides, those more financially invested GET a payback for their investment; asking for more is asking for double compensation, IMO.
... there are no "dividends" per se ...
haven't been able to think of a better word. I'd like to have something else to use -- got any lying around? :-)