Whatever the cause(s) for our current economic predicament, we don't get out of it by cutting gov't spending, or cutting taxes. The reason is simple: without spending, the economy will soon be in a full-blown Depression. Keeping the fire stoked by keeping the money moving is the only way to stop the slide down into the deep-freeze. And I'm pretty sure that nobody here will like it when/if we reach that point.
So the gov't is the only major "buyer" left in the economic arena. If the gov't spends, then all the things that Reagan and Dubya argued about trickle-down economics should happen, albeit in different order: jobs will be created, people will earn wages, they'll spend that money, other jobs will be created by the consumer spending, and that biz cycle will continue to expand, with everybody in it paying taxes that would not be paid if they weren't employed by the growth which the gov't spending spawns. (The only difference, and it is a difference only in the character of the deficit, is that this deficit is going to fund spending by the gov't, rather than to cut taxes, which only promotes spending when consumer confidence is high.)
It may not work, but it's the only remaining shot we've got as an alternative to watching the economic "fire" going out, more or less completely, and having to deal with a Second Great Depression, this time worldwide.