The Northeast (NY, RI, MA) - home of leftist Senators Clinton, Schumer, Kerry, Kennedy, Reed, and Chafee (nominally a Republican) - is already losing population:
http://www.freerepublic.com/focus/f-news/1546261/posts
There are many reasons why the best and the brightest leave the highest taxing states.
It is not just the taxes. To have to deal with the union mentality is frustrating and a waste of time.
The creative minds leave the bureaucratic lumps for places with hope and opportunity.
The only ones who do well in big zoning states and counties are the lawyers, land use planners, and other such experts.
They all deserve each other.