Just thinking, in a patriarchal capitalist system, men are supposed to have the lion's share of wealth. Women should look as if they need feeding. Poorer women who are plump/ fat, look as if they have enough ingenuity to survive. Gaining enough resource from the meager allowance allocated to the poor by society. That they can take care of themselves and therefore, others connected to them, perhaps this explains why men are allowed to be fatter, to look like they are prospering.
And poorer people are offensive when their bodies suggest ingenuity and ambition enough to make the most of little and get a bit more.
Some like their poor feckless and in need, helpless and looking famished.