@okie,
You have no idea what you are talking about. Because real wages have remained flat for 80% of the population for more than 30 years, people have resorted to using credit cards to buy groceries, gasoline and clothes, creating enormous personal debt. The top quintile is able to buy those large houses dubbed McMansions, not the bottom three quintiles.
The sheer size of the Baby Boom pushed the price of domicile up but the problem is beyond the size of the population. The high divorce rate exacerbated the problem. You ought to read
Paper Money by 'Adam Smith.'