Oregon DOT Switching to SUSE Linux

In a move that is intended to save Oregon tax payers 30% of their current expenditures, the Oregon Department of Transportation is migrating to Linux on their IBM zSeries mainframe. So does this mean our taxes will go down or we'll get to wait longer before they go up again? I hear neither is the case, but it's still good to see large organizations keeping up with the times. I imagine it's a lot easier to find someone that knows Linux system administration that zOS administration (or at least that will be around for another 20 years and isn't already on the verge of retirement).