No excuses, they're just gluttonous slobs living in a society where people are lucky enough to be able to over-indulge themselves to such a degree.
Presumably the rest of us have been paying for the junk they've been shovelling down their throats for lord knows how long, as there can't be many jobs going as human bouncy castles.
It's no different from paying somebody to smoke 60 cigs a day IMO.