As long as America can manage debt like Japan, it won't be a big problem. Like Japan, government debt securities are mostly held by domestic and not foreign parties.
Right, QE infinity. What could go wrong?

It may not be a big problem in terms of a currency collapse or something like that. I'm talking more so about Japan's anemic growth over the past few decades.
But there are some economic arguments suggesting that chasing
growth for the sake of growth is a pointless exercise.
Ultimately, we have to ask which is of greater importance:
That some big, arbitrary number is slightly bigger than it was last year?
Or that the economy actually serves the purpose of supporting the people and businesses within that economy?