Archdiocese pushing vouchers to save parochial schools

When I heard about possible parochial school closings, I wondered if this might have implications on the voucher debate.  Wonder no more!  The Archdiocese is openly encouraging parents to lobby for the passage of vouchers, with Archbishop Charles J. Chaput saying, that Catholics are discriminated against by having to pay taxes and then pay for Catholic schools tuition. "Vouchers are a matter of parental rights and basic justice."

http://articles.philly.com/2012-01-12/news/30620232_1_school-vouche...

I never really understood this argument. Wouldn't it violate the "rights and basic justice" of non-Catholics to have their taxes used for the support of parochial schools?   Especially since no one is talking about limiting vouchers to only the students of parents who actually pay taxes.  To the contrary, at least under current legislation, most of the parents of students who will be initially eligible for vouchers pay very little, if any, state taxes.  It will be the rest of us, mostly non-Catholic, tax payers who foot the bill.