Well, who pays the voucher, the feds, the state, or the city or town? Will all the private schools be required to do criminal background checks for hires? Will their salaries pay enough to hire good teachers, and if they can't, then what? I know local private schools are 4-5k a year just to get in(that was a few years ago)
Now, I have nothing against a voucher system if it works. Before we scrap the system and throw ourselves from the frying pan into the fire, it would be good to see it work first, or at least know how it works. I can't make judgement if I don't know.
I have no complaints yet where I am at. My two young ones are in a pretty good school, they are in small classes and the teachers are good. They look forward to going every day. So you would have to show me how better it would be before I pull the school out from under their feet.