They went up. Indiana has the highest growth rate of minimum wage jobs in the Midwest since they became a RTK state.
Here's a list of RTK States and their rankings by Median Household Income.
Alabama (46) $41,415
Arizona (30) $46,709
Arkansas (48) $38,758
Florida (37) $44,299
Georgia (33) $46,007
Idaho (40) $43,341
Indiana (31) $46,438
Iowa (24) $49,427
Kansas (26) $48,964
Louisianna (44) $41,734
Mississippi (50) $36,919
Nebraska (22) $50,296
Nevada (27) $48,927
North Carolina (39) $43,916
North Dakota (20) $51, 704
Oklahoma (41) $43,225
South Carolina (42) $42, 367
South Dakota (28) $48,321
Tennessee (45) $41,693
Texas (25) $49,392
Utah (14) $55, 869
Virginia (7) $61,882
Wyoming (13) $56,322
That's an average ranking of RTK States of 32. That's only 7 States in the top 25 in Median Household Income and only 1 State in the top ten. The average median household income in RTK State is $46,867
By way of comparision there are only 8 non RTK State in the bottom 25 of median household income and only 2 (KY and WV) are in the bottom 10. The average household median income for non-RTK States is $54, 185. So on average a person living on an RTK State has a median household income $8,000/year more than a non-RTK State and $4,000 more than the national median household income of $50,502.
http://en.wikipedia.org/wiki/List_of_U.S._states_by_income#States_ranked_by_median_household_income