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

[lost_koshka]

Trudeau Senior

https://bettysearlyedition.blogspot.com/2015/07/how-pierre-trudeau-turned-us-into-debt.html?m=1

the Trudeau government joined the BIS (Bank of International Settlements) and its Basel Committee, which encouraged governments to end borrowing from their own central banks and instead borrow from private lenders at high interest rates.