Free choice  It is the government’s job to provide schools and courts not to tell people what to eat. The government should stop people harming each other. But it’s not the government’s job to tell people what to do to themselves. Consuming fatty food does not harm other so should not be subject to government control.  A fat tax would be like the government trying to prevent us from frivolous spending and getting into debt by being allowed to tax investments it considers to be bad.