Indiana is one of the few states that tax Prii-type hybrids so you should blame that on your own elected officials. We got it reversed in Va. Toyota and other manufacturers generally recommend against singling out hybrids for more tax - it's plain and simple prejudice against hybrids (some of which eg; Highlander are lower MPG). Plug-ins are a different story as that is an alternate fuel, so auto cos. generally agree a modest added fee for BEV is fair approach. Prime is middle ground somewhere. Tennessee is a good egg for Prii-owner/activists like me because they thought it through and decided not to tax hybrids per se. I know I wrote to their legislative guy at the time, and he wrote back to me.