and by the way, I fully support pointing the finger at the banks who supplied the demand for crappy mortgages. But they're only a small part of the overall problem.
Reducing leverage means that unprofitable deals like a 600K neg-am to an assembly line worker will not get funded. The economy WILL shrink. I'm not saying that's a bad thing, because the alternative is a debt collapse like we are having now, but government intervention to prevent "over leveraging" is going to have the opposite effect in a very bad way.
IOW instead of providing cheap capital that ends up creating bubbles, government is going to make the cost of capital artificially expensive, and the economy will contract more than if everybody just stepped back, took a breath, and let the chips fall where they may.