Look for yourself. There's quite a few studies out there showing that sugary drinks are addictive, and more evidence still that caffeinated drinks are addictive. I am not going to spend my time finding what is freely available to you. Hell, you can probably find some anecdotal evidence in your own experience. Haven't you ever known anyone addicted to sodas? I was born and raised in the midwest in the 80's and 90's, and I'll be damned if nearly everyone's mom wasn't hooked on Mt. Dew or Dr. Pepper.
Yes, I do get a paycheck. No, I don't want to give the whole paycheck to the government. Again, you devolve into hysterics instead of rational discussion. I bet I pay more vice tax than anyone in Philly. I choose to do so. But I don't give hand over my whole check because I choose not to blow my whole check on stuff that has a vice tax.