“To Kasha: what profession can one make an adequate living in these days for just three hours a day?”
So if you don’t want to go with the Rambam that you should work 3 hours a day and learn 8 (and that’s what the Rambam considers a “working person”) but not learn a full day on the public dole, you can go with the Rema and Shach in Hilchos Talmud Torah that says you are allowed to live off tzedaka in order to learn. But in any event, as I demonstrated earlier Yisoschor-Zevulin is not a tzedaka relationship, its a business partnership where Yisoschor is a “working man” by working in learning for his partnership with Zevulin. I’m not aware of any reason why it must be a one to one match, but it could be a one to one match I suppose.