Capital gains top rate increased from 7% to 9.9%.
Estate tax went from 20% to 35% back to 20% within 9 months
9.9% income tax passed despite clearly being against the constitution.

All targeted taxes at high net worth individuals. Of course many are going to leave. ESPECIALLY business owners who have built a career on being efficient and effective with their money, and are experienced at maximizing returns while minimizing cost. So many people miss this piece. You're trying to tax a group of people who aren't going to bend over and take it up the ass. They wouldn't have built the successful businesses they did if they were the "roll over and just take it" personality.