Explain how loaning me my own money will fix the economy

I am not sure I understand basic thinking in regards to modern economics. How is giving me an $800 one time tax credit (loaning me some of my own money) going to fix a debt/spending driven economy?

President Bush publicly confirmed for the first time that he would propose a package of emergency measures, outlining its basic principles on Friday, in an effort to restore the eroding confidence of investors and consumers. The package is expected to include more than $100 billion in one-time tax rebates for individuals and an opportunity for businesses to rapidly write off their capital investments.

As far as I am concerned everything the feds talk about is semantics unless it involves budget cuts or real reductions in federal spending. I don’t know anything about Ben Bernanke. Why should I listen to what he has to say? Someone convince me we aren’t headed for a crisis.