I'm sorry, but I see way heavier people than that working every danged day. That's a cop-out, and the shame should be on the system allowing them to sit on their butts mooching off society.
I'm fat, and I've worked all my life. I'm fat becuase I eat more calories than I burn. Why? Because I don't exercise enough, and I eat too much, especially high fat/high sugar foods. I'm not going to try to blame something other than that.