Want somebody to blame for that? Try Trumpty and his gigantic tax cuts for the rich bill, and the preferential treatment he showed the rich for his entire term in office.
Obviously, Biden is trying to fix that, and help the middle class with his infrastructure bill, for example, and the poor with his and the Dem's child tax deduction, and more. He's also trying to strengthen unions.
When were those "days of equity" that you're talking about? I'd say you'd have to go back to the sixties for that.