Strangely enough it is actually possible to borrow yourself out of debt. All you need to do is make more money out of the money you borrow then you have to pay back in debt. Private business does this all the time. That is the basis for the entire banking system. You can be opposed to it on principle, but in reality it does actually work.
Granted that you spend the money wisely of coarse. Was this a good investment. Well the cars that are being sold are more fuel efficient, and that should reduce the export of currency outside of the country. Not only that it should help reduce the price of petroleum. Which would mean cheaper gas at the pump, and cheaper electricity. Then we have the jobs it can maintain or stimulate which should make for more people able to pay taxes.
The point is we don't know if it was money well spent. If it nets Americans five to six billion in savings over the next five years. Well then it was a one hundred percent return on investment which is much more then any interest incurred. You really have to view all the angles, but as far as government spending goes this at least benefits the American people. How much is the only question two hundred thousand people got cheaper cars.
Speaking to the Republicans. I really wish they were a fiscally conservative party, but they are not. They just want to debt spend on different things, and want to cut taxes so they have even less real money to spend. Sure the Democrats are known for tax and spend, but in the end all the Republican party was about was spending. Maybe in a few years the Republican party will get off the moral high horse they have been placating, and get back to being all about running the government in a responsible manner. I doubt it but we can dream.