Comment by bentcorner

> A simplified model is needed otherwise rigorous analysis becomes impossible, and people make handwavy arguments about how paying workers more means they can spend more, which means factories, and it's a perpetual growth machine!

I'm no economist but you can't live on an island that only produces coconuts, because the people on that island would quickly start producing other stuff, breaking your premise.

This is like saying cash is useless because amoeba haven't evolved a cash economy.