That being said, pure PoS runs the risk of the rentier system, because it reduces upward mobility. Since in pure PoS, "holding is hashing", once you're at the top, you're pretty sure to stay at the top.
Honestly, I think high PoS solves this problem. Instead of people with lots of PoW hashing power being the largest whales, those that are in it the longest are. And even so, it seems like HYP has had a great distribution of coins compared to other coins with smaller pos, fast premines, etc.
top 10 wallets as a percentage of overall coins...
M - (Maieutcoin) top 10 wallets own 56.98% of the total coin supply
XQN (Quotient) - top 10 wallets own 48.11% of the total coin supply
CAP (Bottlecaps) - top 10 wallets own 38.0% of the total coin supply
BALLS (Snowballs) - top 10 wallets own 37.7% of the total coin supply
HBN (Hobonickels) - top 10 wallets own 30.44% of the total coin supply
JPC (Spoetniks oh so great jackpotcoin) top 10 wallets own 28.30% of the total coin supply
HYP (Hyperstake) - top 10 wallets own 22.0% of the total coin supply
HYP's PoS economics gives the ability to mint coins, to anybody that has a bit of patience, the willingness to build a proper portfolio composition of coin blocks, and the ability to connect to the network often. The barrier to entry to mine/mint HYP is very low.