The simulative potential of the plan is hindered by another factor: A majority of the plan's spending is needed just to continue current law -- something that will provide no boost.
According to a draft proposal of the plan, $120 billionwould be spent to extend the
payroll tax cut that has boosted the size of workers' paychecks this year. And $50 billion would be spent on
unemployment insurance.
The expiration of those programs could slow the economy. But at the same time, their extension will not provide any additional stimulus.
"You don't get any extra kick from those things. It just means you avoid the drag of their expiration," Gault said. "That's not going to jumpstart anything."
That leaves only $130 billion in new spending left on the table for roads, infrastructure and aid to states.
Why so little? Politics.
"My suspicion is that economists within the administration are saying the same things about the size of the package. The president's judgment is probably guided by political factors," said Burtless.