You realize that the actual interest rates on loans wasn't 0% right? It was certainly low, but more like 1-2 percent depending on where. Also, spending is absolutely vital to the economy, so we should be encouraging it as much as possible. Saving money is not a risk, it doesn't really stir economic growth, and it's impossible for most people to do until they enter their 30's or 40's.
I have no idea what the interest rate was on loans. The Federal Funds rate was between 0 and 0.25%, that was what I had an issue with. They could have raised the Federal Funds rate to 1% last year or even 0.5% in 2013, but apparently the crisis wasn't over yet. I think it was more that they feared the potentially bearish Wall Street/Dow Jones reaction.
I disagree that most people can't save money until they're in their 30's or older. There are many ways to do it, some just don't want to.