I or others shouldn't have to pay more for sugar because of others inability to limit themselves. There's already several other "taxes" we have to pay. No one wants to add another thing on that list.
But as a tax payer you will pay for the enormous cost on the (public) health care system created by this epidemic of high sugar consumption. Personally I'm not sure why I should have to pay for the type II diabetes bills for the people who ruined their health with bad choices.
Your society taught them to how to make choices. Most people work at a job which ultimately derives income from sales
and marketing folks who go out of their way to encourage people to make poor decisions. The vast majority of advertising shows a savy, intellegent, attractive, funny buyer committing to continually poor decisions.
There is very little in the world encouraging people to make good decisions.