I don't think it matters what the sugar tax is on. How many people are there in the UK who will actually be priced out of the market with a sugar tax? It's not like people in our societies can just barely afford to eat sugar, double the price--what's twice practically free? Still not much. But people see the tax, they say, oh, people think this is serious enough to have a punitive tax--I think there's probably some propaganda value to a tax.