We have never in human history seen a run-up in credit of the kind we have just witnessed in advanced economies since 1970, and we have never observed modern finance-capitalist systems operating over a sustained period at this kind of credit-to-GDP leverage ratio.
If your credit is going to grow at 10-15 percent per year in order to get your 5 percent GDP growth per year, eventually you're going to have a problem. This isn't a stable system.
I could end the deficit in 5 minutes. You just pass a law that says that anytime there is a deficit of more than 3% of GDP all sitting members of congress are ineligible for reelection.
A possibility is that we see more and more leverage, and credit-to-GDP ratios rise once more to even higher levels; eventually the banking systems of all advanced economies reach magnitudes of 500 percent, 1000 percent or more of GDP, so that every economy starts to have financial systems that resemble recent cases like Switzerland, Ireland, Iceland, or Cyprus. That might be a very fragile world to live in.