Most of that debt was accrued from running an American empire that includes 900 military bases across the globe, giving unprecidented tax breaks to the wealthy and corporations, and bailing out financial institutions that crashed the global economy by defrauding poor and middle-class Americans
The corporate-class has been running a redistribution of wealth scheme since the 1980s from the bottom to the top by buying politicians who will vote for their business interests. The results are catastrophic for poor and middle-class Americans. It's time those people have had their interests taken care of, after all, isn't that what our elected officials are supposed to do? A UBI is the least we could do, but, as Bernie Sanders says, the United States is not a compassionate country.
It's funny, when you mention 'survival of the fittest' in the science classroom, conservatives shun it, but when you head over to the economics class, survival of the fittest is the conservative mantra, straight from Ayn Rand's mouth