I’m reminded of the “lock box,” which was a largely unsuccessful political gambit promoted by Al Gore during his 2000 presidential run as a way to make Social Security tax increases more palatable. The idea was that we would ensure that taxes collected for this purpose would not be redirected, making it just one more tax increase.

I'll concede that uncertainty has been developing in my stance on soda taxes. For me, they are such an obvious target — there's NOTHING essential about sugary sodas, and lots to argue against them.

But where does it stop?