I think you're engaging in a bit of humor, here, but Trump was born at the top of the socioeconomic ladder. There's nowhere for him to go but down. I don't think this study applies to people like him.
Attractiveness runs in Trumps family. He afterall was the Paris Hilton / Kardashians of the 80s and early 90s. Those types of socialites have beauty and wealth and society loves to follow them because of it.