I feel like the conclusion you are drawing from pushing to is weak here. Yes, those with chemical dependencies for smoking or drinking that also are poor would fall in this category of taxes but sugary drinks, fast food, and prepared food I would say do not fall in that category. I'm not sure how you are tying the other ones because they are primarily consumption taxes as being pushed exclusively on the poor. Even when I was less fortunate what was killing me were things like gas tax, having tolls be more expensive then electronic payments/ezpass, paying government fees and incurring service charges unless you do some crazy manual effort, or running into services that needed me to have a smartphone with data instead of the flip phone I had at the time. Yes, I ate fast food and bought prepared food but I just did it less than I am doing now and I was choosing options that matched my income so my total tax burden from those verticals were lower anyway.