Japan is actually the largest, fwiw. These Fed programs are being financed by debt spending, not tax increases. So even if some of this debt is held by US tax payers, it's not at their expense. They're getting paid interest.
Which, in the long run, will also make the stock market, and their options increase, as revenue and profit inflate.
But not in the short term.
It's like they are mortgaging the White House at 0.25% and buying bonds that pay 4%.
Also worth looking at the last time the USA completely paid off its government debt.
> On January 8, 1835, president Andrew Jackson paid off the entire national debt, the only time in U.S. history that has been accomplished. [1]
[1] https://en.wikipedia.org/wiki/History_of_the_United_States_p...
In Andrew Jackson's case they also raised taxes: