Since everyone seems so against trickle-down, I feel compelled to defend it:
Trickle-down economics works extremely well on a global scale.
For example, rich companies have invested very heavily in developing nations, and as a result -- we have decreased world poverty by more than half in the past 30 years. This is a very clear and obvious example of the rich elevating the world, which wouldn't have happened if the rich did not exist.
If we give rich companies more money, where exactly do you think they are going to invest it? I bet it is exactly the same place that they are already investing in -- new foreign markets.
If we give the US government more money, where do you think they will invest it? Maybe they'll invest it in the US.