It's really more a lifestyle.
If you are chronically unemployed or paid hourly, homeless or rent month-to-month, under-educated you may be lower class.
If you have live-in servants, multiple homes, inherited exclusive private club memberships, and multi-generational land and wealth, sit on various profit and non-profit Boards, you may be upper class.
Everyone else is middle class.
This has always kind of been MMM's whole point.
That you can spend A LOT of money and still be living a life that looks remarkably similar to someone who spends, say, only mid 5 figures each year.
I'm friends with a lot of very wealthy people, and everything they do is expensive, but yeah, for the most part it's still just crazy expensive versions of the same lifestyle that middle class folks live.
Without context cues as to *why* something costs 10-100 TIMES as much, it's actually kind of hard to distinguish from the outside why one person's ultra expensive lifestyle might actually cost that much more than a typical middle class lifestyle.
Like sure, anyone can tell that a pretty car is prettier than an ugly car, but unless you know cars, you wouldn't be able to tell just by looking at them why a certain pretty car costs as much as a house.
For example, my aunt and I both own summer homes. Hers is larger and more modern, mine is smaller, but an exquisitely maintained heritage home. Both have beautiful water views. Mine has more houses in the way, but the actual water view is much nicer, and the houses in the village add charm to the view, IMO.
Without knowing the reasons why real estate is so different in the two regions, no one from the outside would predict that my home is 86K and hers is 3-5M.
That said, there's no way I'm calling her "middle class" not when she's well into the 1% of wealth. Also, in my experience living among the ultra wealthy, a lot of those live-in-help, generational land types are actually a lot *less* wealthy than their newer wealth counterparts because many of the old wealth estates erode with every generation.
There are some families that have billions with chateaus next to families that *used to* have billions and living very similar lifestyles despite radically different levels of wealth.
And because their wealth is usually so frickin' hidden, it's hard to even say which family is which, especially with their penchant for making their kids financially fend for themselves until they inherit.
I've even seen multiple cases where the wealth is hidden from the kids. So they have no idea if they're going to inherit an enormous fortune or if they'll inherit an albatross of family land drowning in debt. It's like inheritance Russian roulette.
It can actually be very difficult to assess just how wealthy someone is based on their lifestyle, even when you know the context cues.
What you *can* reasonably decipher, if you know the cues, is what type of wealth the person
wants you to perceive.