This is a very common argument, but aren't the rich already doing as much as possible to avoid the 39.6% rate?
But if rates go up, then it turns into saving $100k, but with the same costs of implementation and upkeep. Basically, as rates go up, it makes sense to do more tax planning.
Yes, but the rich nonetheless pay the lion's share of income taxes:
The share of income earned by the top 1 percent of taxpayers rose to 20.6 percent in 2014. Their share of federal individual income taxes also rose, to 39.5 percent.
from https://taxfoundation.org/summary-latest-federal-income-tax-...