It is a dynamic with hard edge cases. If there's "equality" (and no possibility of wealth ac ulation) then there's no incentive to work harder than the next guy. But if we understand there's wealth ac ulation, then you can also reach the other end of the spectrum, and have a case where too few people have too much wealth ac ulated. At that point, economically speaking, you end up with people that extract more than then put into the economy, and the economy eventually gets to a standstill (ie: somebody owns all properties in monopoly and has all the funny money). That's one reason taxes exist (especially in their progressive form). One of it's primary functions is to take wealth and put it back into the economy.