Actually, GNP in 2020 was $21.6 trillion, not $3.7 trillion. I agree that taxing as a solution is horrible. No one ever talks about reducing spending anymore, mainly because there are so many people eating at the public trough.
GNP is everything in America. 3.7 trillion is our national income. That is what is received at the treasury from taxes and fees.
In a very real sense, THAT is the government’s paycheck into the checking account, so to speak. And cast against that is the government’s debt which will soon be pushing against 34 trillion.
GNP means very little against that. Except that trying to strip mine it will immediately reduce those profit making activities.