p.s. US government debt - interest expenses and average rate
US government debt - interest expenses for fiscal year 2021 = 562.4 billion US-$ = 562,400,000,000 US-$ (!!!) at an actual average interest rate of 1.605 % (!!!)
https://www.treasurydirect.gov/govt/rates/avg/2021/2021_09.htm
Think about !