Here is the distribution of block producing nodes on Ethereum.
Irrelevant. Not once did you mention casper, which is all that matters long term in comparison to DPOS.
Also, people with a large stake in the system don't automatically do what is best for the system. Hitler was a billionaire.
casper mentioned in 2nd part: https://steemit.com/eos/@dan/reponse-to-vitalik-s-written-remarks
Casper is highly centralized and punishes dissent. Additionally casper distribution was through 72% premine and ICO - both worst possible methods enforcing centralization further
Finally, casper in no way avoids the same complete eth centralization demonstrated during bailout