Vouchers don't steal tax dollars from public schools. They (rightfully) give parents (some) of their tax dollars back to provide those parents funding to put their kids in a better performing school, if it happens to be private.  In other words, the anti-voucher program is actually the method that is stealing money. It then puts it into an often inferior system the families may have chosen not to utilize. Rephrased, they're being forced to pay for a program they're not using.

Removing the voucher program essentially entitles public schools and teachers who are underperforming to the same funds as if they were performing exceptionally. Where's the motivation to improve if you are rewarded either way?  The same goes for a tenure-based (read: entitlement-based) salary versus a market-based (read: performance-based) salary.  

Typical liberal agenda. Entitlements for all, and remove free market. I see a continuous slide in the quality of a DCS education, and a lot of attrition coming up.