The relative income of the working class and lower middle class only started declining after the Oil Shock of 1973, which is when the post-War boom ended. The monetarist policies imposed from 1980 onwards accelerated this process, and led us to where we are today. I repeat: the Boomers were lazy, because they could afford to be. Their laziness would have no serious consequences for them in an economy being run at full employment. It’s their children and grandchildren who cannot afford to be lazy, because the consequences for them personally and for their families would be severe. As I said, labour discipline was reimposed on the working class using supply-side monetarist policies.
You said Boomers were lazy, that is simply wrong. As a group, they kept working more hours, until the big crash, after which they couldn't.
There were no supply side policies, that is just BS.
Seriously, read Price of Inequality, your library can get you a copy, piece of cake.