But what you do achieve is making credit (ie money) available for businesses and generally thats a good thing for the economy.
It might be, it might not. If it's a poor investment, you have people and resources being soaked up doing something when they might otherwise be more gainfully employed. It might have been better for people to hold on to their money until a better opportunity comes along. But if you do that in the current environment, you're losing value. So spend, spend spend and hope you don't get caught holding the bag (Hint: you will because when it all goes South, the government will take even more of your money to bail the big boys out).
I can't believe anyone can honestly look around at what we're in now and think the status quo is a good idea.