You are probably correct, or at least I hope you are. However, that doesn't take away from the fact that it's ridiculous that they are even proposing these types of taxes.
it's only ridiculous because you don't understand what the hell you are posting.
if you go read the link from fox, it is just proposal from a WHO working group. What does WHO do? Go Google it and you'd know they push health care related agenda. The working group simply come up with a study saying countries around the world need to spend more on health care and along with the suggestion, they come up with proposals on where countries would get the money for that.
First of all, it's just a proposal from a working group from one of UN's arm working on very specific area. it is far from the official UN position. Second, even if this is UN's position, this has to be agreed by member countries and sorry to disappoint you, not this shadow UN government. Third, even if this is agreed by member countries, UN has no power to enforce it, it's all up to member countries to enforce the tax if they think health initiatives are that important.
So go try to understand how things work before posting something absolutely ridiculous that only shows your shallow understanding of the topic.