Just looking at the headline of this Crain’s Chicago Business article gives a clue as to effect switching from a flat rate to a progressive income tax will have on rich people in Illinois:
“It’s not just the weather,” says one Bloomington, Ill., executive. “The advantages of the tax code are greatly appreciated . . . right now, we pay a lot of state income tax.”
There is no income tax in Florida.
Also no snow to shovel.