It takes about 30 seconds for the US National Debt clock (https://www.usdebtclock.org/) to tick off $1 million, so almost 2.5 days to tick off $7 billion. I'd say $7 billion covers much more than 3 seconds of interest.
That seems like a sizable contribution for a single person in a country of 330 million.
So if you're so gung-ho positive we can make a dent in the debt, then why not make sensible comments about making changes so the tax is not so easily avoidable instead of nonsensical fat people comments