As an upper-middle class person, this makes so much sense. Tons of folks that moved from a $50k a year household to a $150k household and then develop this ridiculous "fuck you, I got mine" entitlement complex.
I, for one, come from an upper middle class household, with about a $175k annual income. My dad, a rather successful consultant, came from a household which he described as poor and an environment that he described as without any hands up (in reality, his father was a unionized steel-mill worker in suburban Ohio that made roughly $90k in today's money to support a six-person household). As much as I love him as a parent, he is completely lacking in empathy--likes to repeat the obviously fake welfare queen stories he hears, has a bizarre hatred for black people, native Americans, and for some reason, Hispanics (he's Hispanic himself) which he always says isn't racism but let's face it, claiming that black people should be stopped and frisked because of their predilection toward crime is pretty god-damn racist. He's repeatedly claimed that he could just quit working and draw $50k a year from the government from UE alone (neglecting the fact that UE is not an entitlement program and is meted out based on the prior income of the unemployed and that he wouldn't be able to means-test into SNAP, WIC, or EBT based on prior income). As an upper-middle class person, I went to a mid-grade private school in the Chicago suburbs, and I saw a startling trend of the same variety of thinking--this bizarre idea that because they were born into money, they have no obligation to help those who don't have the same advantages they do. Of course, it's a Catholic school, so that should be obvious. I'm aware the plural of anecdotes isn't data, but that article really gives me a confirmation bias hard-on.