“Lehmiller even went as far as breaking down the sexual orientation of his participants, explaining that 18% of heterosexual men have fantasized about feet before, compared to a very small 5% of heterosexual women. Twenty-one percent of gay or bisexual identifying men and 11% of lesbian or bisexual women also shared their experiences with foot-related sexual fantasies.”
Having a fantasy is not quite the same as having a kink but this should give you some idea. My assumption is that most kinks are far less common in women because (on average) women have a lower libido than men.
I’m also guessing that the crowd of people willing to send unsolicited inquiries in response to a photo posted in a medical context is going to skew even more male than the population of people with this kink.
Actual members of congress are very few in number and aren’t generally the wealthiest people in the area. I doubt it would have much impact.
I grew up in this area and while most people I knew made a comfortable living, the vast majority of people are working white-collar professionals, not capitalist owners or politicians.