Here's a thought experiment: make a crypto currency that binds to personal human lifetime, i.e. that (in order to disincentivize rent-seeking and exploitation) makes it prohibitively expensive to spend this currency if the blockchain indicates that it has been "tainted" by not originating from an individual's lifetime bound contingent (i.e. tainting your contingent with other people's money has an exponentially increasing penalty).

Exploitation is disincentivized (since the more money you aggregate from other people, the less it is worth to you (relatively speaking)). Monopolies are disincentivized by the same mechanism, i.e. the Coca Cola company selling to 100 million people makes less money than 10000 companies selling to 10000 customers each.

"But this stunts growth!" Yes, it does; but the curve can be shaped, and could probably be adjusted by forking in a democratic fashion (if mining is actually democratized).