Consider Ethereum's stats (and other similar PoS minting methods):
Presale ICO / Premine ( max cost $0.50 USD per ETH )
= 72,009,990 ETH
Total Supply today (Feb 23rd 2018)
= 97,800,000 ETH
Source:
https://etherscan.io/stat/supply
Now imagine a financial system where all the wealthy have to do simply own money (spawned from software or premine) to get more money. Or where voting is done by merely by controlling a large sum of money/tokens.