Congress has already appropriated the money and set the tax policy for funding the appropriations. Presumably, they know that if they come up short, they have the finance the difference. We all know that Republicans are deadbeats at heart, but Obama and the Dems have a responsibility to the nation to make good on the bills already incurred by Congress.
And btw, chumps, all your whining about Democratic hypocrisy is right back at you. No one in their right mind would ever think that you would not support Bush doing the same thing if it was the House Democratic caucus was holding the economy hostage. So spare us the moral outrage. In the end, it is Republicans, not Democrats, who are deadset on crashing the economy again.