Don't laugh, sounds like a good way to make some extra money.
Fat women have money to burn. And they'll do anything to try and up their appeal. Including to buy all kinds of shoes to go with all their outfits, and all the extras a shoe salesman could throw at them.
Heck, some of those chubby women actually do a good job of being sexy in spite of their dis-advantage.
Of course, I'm glad I never married one. My wife has about 2 ounces of spare weight, and it's exactly where I like to see it, if you catch my drift. (One ounce on each cheek).