For most income brackets New Jersey doesn't really have an income tax problem. I believe the state income tax rates are lower than all of the neighboring states, except in the very highest bracket.
New Jersey's income tax might be a little lower than the New York City's combined rates but definitely higher then Pennsylvania's 3.07% -- it's nearly three times the tax on those "one percenters" -- 8.98% -- that they are chasing away. Delaware's income taxes are lower, too, although not by that much.
The state has income tax rates comparable to North Carolina, but New Jersey also has a high sales tax, astronomically high property taxes and a fairly hefty death tax. (I also believe it's the only state that one needs to pay a toll to leave when traveling either east or west. Many say it's well worth it to get out, tho.)