That's the thing I hate about trickle down. Proponents argue that the increased savings will mean they'll hire more people, but they're not going to hire if there's no reason to. Instead, we just have less tax revenue overall. If you want more people hired, give tax cuts solely to the middle and lower classes. Give them more money to spend, and they'll spend it, unlike the rich. This then drives a need for more workers, creating a nice positive feedback loop.