Realistically Mondragon is rooted in Catholic social teaching (founded by a priest). Thus it requires someone to be motivated by something other than money. Religion is one of the few things that will be able to inspire such amounts of work while forgoing most economic upside.

Maybe nationalism can do that, but keep in mind that when this was combined with nationalism we got Nazism (Nazism took lots of inspiration from Austrian corporatism which was similarly influenced by Catholic social teaching here). I'm not sure it's either safe or advisable to do this aside from religion