The Democrats are playing for the long run here, no rip and run, so they won't be piling on the pork, until the GOP is in the coffin, with the stake through it's heart.
That means doing the right thing for the next two years, because in 2008 the Party of the People will hold the high ground, they already have a larger majority in the House than the GOP ever had during the Republican Hegemony. In 2008 there are 22 GOP Senate seats in play, with 10 expected to be open, on the other side the Democrats will only be defending 11 Senate seats, and only 4 of those will be open, so if they can keep the momentum going they can get a death grip on the Senate, and the White House.
Then they can play around, and dish out some bacon, but until then, they have to hold the line, if they do that, the GOP majority hasn't been born yet.

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“ The subjects of every state ought to contribute towards the support of the government, as nearly as possible, in proportion to their respective abilities; that is, in proportion to the revenue which they respectively enjoy under the protection of the state.”

Adam Smith , The Wealth of Nations 1776

"We have always known that heedless self-interest was bad morals; we know now that it is bad economics"
FDR's second Inaugural Address