I hear what you are saying, and there is a law in the works to do just that. However, the law only allows a tax break for those with "approved curriculum." That's how the gov't will get their little fingers into your everyday homeschool. Someone has to decide what's approved and what isn't. I'd just as soon have the Dept of Education abolished, and have the money spent there knocked out of our taxes. Then let me choose how I want to spend it. Public schools would actually have to be good and compete for our money. I know -- there are holes in my idea -- but it would be a place to start.
The voucher program is really hot in Wisconsin. Our gov, gov veto, is in the back pocket of the wi teacher's union. He might win this one, but, it's not going away and the kids will ultimately win.