If you followed recent headlines, tax on sugary drinks has been a subject in Democratic primaries. Even though high-fructose corn syrup has been linked to obesity, diabetes and myriad of other problems related to that, some members of liberal community oppose a consumption tax on sugary drinks on the basis that it hits lower-income families disproportionally http://www.csmonitor.com/Business/Tax-VOX/2016/0430/Bernie-s...

Apparently obesity and diabetes hit lower-income families disproportionally as well http://www.livescience.com/37923-type-2-diabetes-low-income-... (who would have thunk), but we can always create a government program to conduct more research on causes.