70% marginal tax rate is incentive? or a "break"? compared to 0% for the lower 40%?

As for your thought experiment...if we take all of that market meddling out of the tax codes we probably wouldn't need to distribute it back out and could probably use just a portion of it to buy health care policies for every man, woman and child in the country...and have a better running economy with higher employment to boot.

So...I like your plan.