I recommend reading Thomas Piketty if you want some of the more modern works on what is going on with our social economics in the west. It's not exactly a new phenomenon though, wealth inequality is part of the cycle of civilization and it always leads to some form of wealth redistribution. How that happens is historically up to whatever aristocracy is in charge, though with the introduction of democracy it's typically done through very high taxes. Before the Regan Thatcher era an 80% tax on the wealthiest (and this means all methods of income) wasn't uncommon, and they were still the wealthiest.
Anyway. It's going to change eventually. Especially the housing market is going to suck. I'm Danish, I bought a townhouse with my wife for 3m DKK. If it were to follow my parents 30 year increase on their house, we should be able to sell it for 26m dkk by 2050... which isn't going to happen.