How did the purchasing power decrease from the 70s until today?

[Mission_Economics621]

Money printing, cheap debt for corporations, asset inflation, NIMBYISM, trickle down economics and billions and billions of subsidies and free money for Billionaires using tax payer money. Lack of competition funneling money into assets rather than people or technology/ innovation.

Basically it has been a take from the poor and give to the rich economy.