How exactly are Obama's "tax cuts for the middle cl" going to grow the economy when Bush's Stimulus didn't?

you don't spend your way out of a recession, you work your way out of it, by putting people to work and creating jobs for a new infrastructure. that's how FDR got us out of the depression, and it's similar to how Obama plans to improve our economy. Just think of how many new jobs would be available in a green economy. not only would this create millions of new jobs, but it would potentially create the infrastructure required to end our dependence on foreign oil and make us self-sufficient in terms of energy. the tax cuts are so the new workers won't have to give up a lot of their newly earned income.