I have not heard much of the talking heads discussing the implications of such a drain and competition for funds.
With commercial loans down so far, what competition is there really? The Fed creates the rudiments of money, but it can't force people to borrow it, which is when it actually becomes money. The government, on the other hand, having no need to borrow only when the NPV is positive, can borrow to create all sorts of boondoggles. So, you could have massive deficits but, if the only borrowing was from the public sector, rates could remain stable.
I'm not sure I think this is true, but it was the subject of an article I was reading recently and, of course, if companies aren't borrowing it's tough for economic growth to occur that isn't government-related. That's probably why the same person who wrote this article wrote another about how a US pullback from responsibility in Iraq would be bad for the economy.
Just thought I'd throw this out there and see if you had any comments. If you disagree, remember, don't shoot the messenger.