Your second sentence: source, please?
The high debts incurred is not "a related problem" but rather the cause for "few US citizens...motivated to attain high levels of education."
Also, "If the market value of the dollar reflects its true worth.." leads you to a false "then" statement. By definition, the market value of the dollar does reflect its worth. And as long as USD are backed by reliable, stable economic fiat, that will continue. Of course, if you try to shut down the government via silly grandstanding, you might lose that, but then this discussion about immigration will be the least of your worries.