Kevin Donnelly argues that school vouchers are an education debate we have to have. Empowering parents is not only good in theory; the closer power resides with people the better.The issue of government funding to non-government schools has returned to centre stage. The ALP has decided to get rid of its hit list of so-called wealthy private schools, finally realising that all parents pay taxes, regardless of where their children go to school.At the same time, the Federal Government has announced…