Or any system where owners of property could extract profit by employing non-owners of property. Much of the strife in the later Roman Empire was caused by lar

Or any system where owners of property could extract profit by employing non-owners of property. Much of the strife in the later Roman Empire was caused by large property owners exploiting slaves and depriving non land owners (including many legionaries) of a chance of making an income. Said legionaries and other plebeians supported politicians with a policy of land reforms. Not to mention the poverty of the slaves themselves.