That is a question asked by Adam Smith and Bruce Yandle in an article over at Reason.com. They write of the traditional Baptist and Bootlegger scenario where one group with the moral high ground gives cover to another group with entirely different motives:
They then go on to discuss the various calls for soda taxes. But, they apparently only see Baptists and no bootleggers.
Because Coca-Cola and other soda manufacturers also sell diet drinks, juices, water, and other non-taxed alternatives, they apparently don't have an incentive to be "bootleggers", and thus Smith and Yandle conclude there are none, which is why they argue that soda taxes haven't gotten far politically.
In part they're right. But, I think they're missing an all together different sort of "bootlegger" in the story. Some baptists are bootleggers: they're one and the same.
Yes, non-profits, public health advocates, academics, and bureaucrats often make appeals that seem virtuous and Baptist-like. But, often their motives are less than altruistic.
Consider the fact that almost every call for soda or fat taxes also suggests that the tax receipts should be spent on activities that would directly or indirectly benefit said groups. Here for example, is Mark Bittman in the New York Times
A New York Assemblyman, arguing for a statewide fat tax said the proposal should go foward
Yes, these programs might benefit people's health. But, look at who else the earmarks also help. Who will be paid to do the education, promotion, monitoring, etc.? Moreover, the federal government already spends millions of dollars every year on dietary and obesity research, and surely many academics would benefit from increased budgets for research and education grants on obesity, nutrition, and health care.
I'm not necessarily saying this sort of research or education shouldn't be done, but what I am saying is that many of the Baptists in this case also have (perhaps not even self conscious) bootlegger-type motives. As a result, its often hard to have thoughtful discussions about the economic justifications (or lack thereof) of fat taxes. I think it was Upton Sinclair who said