 Corbett has said, however, that he will not attempt to limit collective bargaining, as have Republican Governors John Kasich of Ohio and Scott Walker of Wisconsin.Corbett's 2013–14 budget included a $90 million increase to basic education, as well as increases to programs that help people with mental and physical disabilities.Corbett maintained that Pennsylvania should not institute a natural gas extraction tax, due to its already high corporate net income tax.