The poor can afford food, but of what quality? Looking at the pricing of shitty food vs quality food, it's pretty obvious that the poor are disproportionately consuming crap, with all the attendant health problems that brings. Health problems that they are unlikely to be able to afford to effectively treat.

Yes, by many measures, life for the poorest in the first world is far less miserable than it was 100 years ago. But still pretty miserable as anyone who has been poor - really poor - knows. Dickensian quality of life shouldn't be used as a the baseline against which we measure ourselves in the 21st century.