"This can only be because we spent our money poorly - ..."
Irresponsible spending is not the only way to accumulate $17 trillion in debt.
As long as the real interest rate is negative, it's perfectly rational for the US government to keep increasing debt, as long as the debt is at a level where the US could reasonably pay down most of the principle that becomes due each year if the US loses the ability to roll the debt forward at rates below inflation. Currently, yield on the 10-year is about 2.75% and US real effective exchange rate inflation is just over 3%.
Back in... 2003? I remember one bank offering credit cards with no annual fee and zero interest for the first year. I got a credit card for $2,500, maxxed it out on tax-deductible charity donations I was going to make anyway, paid it off a year later, and never touched the card again. One friend told me there was a loophole in the bank's promotion for rolling debt from another credit card, where you could for free turn that credit limit into a one year interest-free personal loan. Depending on one's risk appetite, one would then either buy US treasuries, 6 month CDs, or some high grade commercial paper. As long as one had enough savings to easily stomach a $2,500 loss if things went sour, it was perfectly rational to max out one of these credit cards for an arbitrage opportunity of about 200 bps. (* This should not be construed as investment advice or solicitation for any investment.) Then again, that's a fair amount of work for a free $50.
Now, it seems the US government doesn't have a plan for dealing with this debt if the world stops charging the US insanely low interest rates on its debt. That's irresponsible spending.
Debt isn't the problem. The problem is the lack of a good plan to reduce debt when the world stops paying the US 25 bps for the privilege of holding US debt.