In that sense, the archaic definition of upper class exists and is being as a mechanism for social prejudice and exclusivity; as a way to keep new money out. I

In that sense, the archaic definition of upper class exists and is being as a mechanism for social prejudice and exclusivity; as a way to keep new money out. I don’t disagree it exists, but I’d argue it’s socially harmful and that we should actively strive to replace that definition with the one that’s actually measurable, rather than arguing against socio-economic status as a synonym for social class like the GP’s comment did.