Because government has the might to compel compliance with its dictates, it cuts itself off from essential feedback on the success or failure of its efforts. Government coercion rides roughshod over differing values. The balancing of values that typically occurs in the marketplace is suppressed. In its place, costly, and frequently ineffective measures are imposed. The fact that government is funded through taxation increases the odds that government programs will fail to achieve their announced objectives.
Taxes sever the link between costs and benefits.
At the same time, no one has an incentive to provide more resources. Those who receive the benefits do not have to pay the costs. Those who pay the costs do not receive the benefits. This is the formula for failure that contributed to the demise of socialistic societies like the Soviet Union, East Germany, and Poland. Almost all of the urban transportation systems in America are operated under conditions that could most accurately be characterized as socialistic.