Coulson: Vouchers are a terrible idea! please tell me if im wrong

I feel as if this blog might alienate me from some of the class. But really I do not mind. Coulson says that vouchers to attend privates schools should be given to the economically less fortunate. Unfortunately for him he contradicts himself in his own essay!:

Additionally, a student must believe he or she is capable of some degree of
educational success in order to undertake the effort to learn. In the field of psychology this is known as the "locus of control" effect; when a person believes a goal to be beyond his or her control, he or she is not likely to seek it.

^This is a quote he makes. Some people are naturally more gifted then others and have a higher intelligent quotient, or capacity to learn. Some schools are geared toward aiding more gifted people, some are not. If you give a voucher to someone who is not necessarily mentally capable with doing the work at upper echelon private schools, then you are wasting the schools time and the donors money.

This is simply one reason why the voucher system is a bad idea. I suppose if you instituted schools that specialize in teaching children of similar mental abilities via standardized tests this could work. Kids would have to be tested to see which range of schools they could choose from and participate in classes with peers of similar mentally ability. (If you disagree with me, please say so, I'm tough i can take the criticism.)