Steve Pofker of the Pioneer Institute (’’Gas tax isn’t a simple cure for Mass. transportation’’, Nov 24) avoids an important aspect of proposed “increases’’ in state gasoline taxes - it has not risen since 1990. The consumer price index has increased 63 percent in that time, so every year we essentially get a tax cut. Adding to that the fact that many of us drive more fuel-efficient cars, revenue falls farther behind needs year after year. Simply adjusting the tax for inflation, and index it going forward, would help tremendously in our struggle to address our backlog of infrastructure work.