Because it's important to create different classes of people; declare some classes to be pariahs; and tax the pariahs differently than the other classes.
ECON 101. An increase in price will result in an increase in the black market decrease in demand.
Or maybe you just forgot the sarcasm tag?
Probably just another case of Freeper liberalism. Happens alot lately. Since Romney in fact.
People in California use too much water, we should tax it so high that they are more careful about how much they use.
People in Montana drive too far and use too much gas. We should raise the gas tax by $5 per gallon and start taxing them by the mile to make them stop.
People in bakeries don’t make enough cakes for gay people, we should use the power of government to force compliance or drive them out of business.
/s