I can see Polly's family talking about how they should take a cruise together one day. She then crowdfunds a passport and makes an Amazon wishlist of ridiculous stuff no one needs. Of course the trip never happens so she's left with a passport that people chipped in and bought for her (or more likely, she used money they donated thinking it would go to animal care to buy it).
TBH, I find the comment asking about passports more idiotic than her response. While I bet most people who are over a certain income have one, there is no need for a middle class American to get one. Do they know how big this country is? An American citizen can go to the Alaskan wilderness, California wine country, skiing in the Rocky Mountains, the casinos in Las Vegas, high fashion in NYC, and beaches in Florida all within our country.