This is wrong. The USA hasn't had an edge in economics for a while now.
The USA became filthy rich due to WW2.
WW2 destroyed Europe and Asia and the USA was untouched. Thus the USA became the World's number one producer.
The same accumulation and mobilization if capital to gear up for the war was then used to sell shyt.
Britain and France retreated from the world stage to lick their wounds. Japan became a USA colony pretty much. China closed itself off and reorganized their society.
Only country that was left, that had any real power to challenge the USA was the USSR.
By the 1970s, Japan bested the USA's auto industry. By the 1990s, Japan was considered an economic rival to the USA.
Due to the Cold War, the USA created NATO shf rendered many militaries in Europe obsolete. Therefore many Europe countries decided to create social democracies to serve their citizebs while the USA essentially vows to protect them .
The USA isn't number 1 anything besides incarceration rates, military spending and drug consumption.
The USA reputation as an economic powerhouse that gives people a true middle class life was one period of time after WW2.
When the rest of the world reorganizing itself and the USA had no competition.