Comment: We could easily have current, detailed information on the extent to which taxpayers are fleeing Illinois and other troubled states but the IRS, for no reason, won’t give it out. As we wrote here last year the anecdotal evidence is overwhelming that biggest taxpayers, especially, are leaving, but both Illinois and the IRS hide the data.

http://ilnews.org/2780/irs-dragging-feet-in-release-of-inter-state-migration-data/