The USA's GDP increase in the past 20+ years is due to taking up US$ trillions of state debt "equaling that GDP growth" - same goes for most other countries as well, and not due to a factually grown economy.
A major part of the US State-debt, however derives from, e.g. the costs of War on Terrorism = US$ 8 trillion, plus all those other wars.
This sum is spend vastly onto e.g. military goods, and thus only initially contributes to a onetime GDP growth. Same goes presently for Russia were it's increased military spending, has also provided for a risen GDP. - despite its factual economic decline. And therefore it's need to take further state-debt into account, in the coming years.
So the USA can't increase it's GDP via a factually stronger economy. However the GDP growth is vital for the USA and any other country in regards to assigning an international currency value for the US$ or their respective currency, but foremost to retain their loan credibility. Aka if your GDP goes down, less or no GDP growth - who will lend you money for further loans, at what interest rate? and thus preventing a hyperinflation? So GDP, GDP, GDP. - growth, needs to be documented - just as a private person will only get more loans via providing a higher asset value (GDP). No growth in asset value no additional loans from the bank.
So you get these "smart criminals" falsifying their bookkeeping, or e.g. taking an "undocumented" overseas credit - thus using that credit to increase their asset value at home, then approaching their home-bank for a further credit, via documenting their asset (GDP) growth.
How do you increase a companies asset value? e..g by investing into future profit makers -e.g. production machinery. Or simply by buying 50 BMW company cars - that will all loose their value in the coming years down to zero - but initially look damn good on an asset balance sheet. The US government is documenting its asset growth (GDP) growth via trillions invested in military goods - looks damn good on the asset (GDP) growth chart - but will have zero asset value in the future.
It's the political "elite" in the USA that obviously prefers to make fast and easy bucks via the military industrial complex - instead of investing it into the future of a growing economy of the USA. (probably far to stressful) And as long the USA and the world believes into the USA's payback ability aka financial trustworthiness - demonstrated by a growing "GDP" to get new loans every year, all is fine. !!
The USA is in competition, foremost with China - the outcome of this competition will decide the value of the respective currency and the respective
vital loan-credibility. China is the one that invests into new machinery - whilst the USA is the one that buys 50 company cars.