Taxing sugary drinks has become a popular policy to fight obesity, but I'm not convinced it actually changes behavior. I've seen data from Mexico's soda tax, which cut consumption by around 7% in the first year—yet obesity rates there remain alarmingly high. The tax hits low-income families hardest, since they spend a larger share of their income on these beverages. Isn't it just a regressive measure that makes politicians feel good without solving the real problem?