Don’t necessarily think they would. But if the “productive classes” are 10%, 5% or 1% of the population, the equation changes dramatically.
Unless the productive classes want to kill off or enslave the others, they’re going to have to give them enough to keep them happy enough not to rebel.
Carry the logic of increasing productivity far enough, and at some point you produce nearly infinite stuff with almost zero human input. Intelligent machines have, at least in theory, the ability to completely replace humans in production and potentially even in innovation.
At that point there will BE no human “productive classes.” Only people “taken care of” by machines. Who might eventually wonder why they should bother to do so.
Nope. The productive classes just need to STOP making it viable for a non-productive woman to have 10 kids while on the dole. If a woman had to survive on her own production, and that was only good enough to support her, then she would refrain from having kids.