Firstly, they both come from money
Not buying £15m houses in their own right, but still serious money
Secondly, you mixing in ‘affluent circles’ at uni is still a million miles away from the sort of elite world they exist in and have always existed in, despite the ridiculous and horribly sexist narrative that Carole was some sort of scheming dragon who groomed her daughters to be trophy wives
The reality is that they are both privately educated, grew up in a house worth millions, are conveniently beautiful, intelligent and have enough family money that they could explore fun jobs after graduation without worrying about how the rent would be paid, which gave them plenty of time to party and socialise in the rarified section of very upper-middles London partying
People working in senior roles in hedge funds, private equity, investment banking, are making millions a year. They don’t need a wife with a pin money job, and they absolutely know the difference between someone just out to ride on the coat tails of their income for a good life, and someone who is able to join them on a ski/shoot/St trop trip and fit right in. Most men in this world want the latter
If you need to learn more about this world, get yourself a subscription to Tatler and read every month about the women restoring the big houses and running their ‘interiors business’ after meeting their wealthy spouse. It’s really not something unique to Pippa and Catherine