In the UK after the Conservatives came to power in 2010 electing an Old Etonian, I felt culturally there was a shift towards "posh" is good as a signifier of status and social power.
I feel like in the last 5 years or so it has turned to posh is "uncool".
In the US, I feel like they had something similar. Obama was elected in 2008, but some people did have concerns of electing someone unestablished. To assuage these concerns, Obama promoted and kept safe the interests the elite at the time. Not detracting Obama here - that's the position he was in back in 2008 when some would have considered electing a black man to the Office as unthinkable.
Heath, son of carpenter/builder, Scholarship to Oxford
Wilson, father was an industrial chemist, scholarship to go to school, bursary to go to university
Callaghan, father enlisted man in the Navy, then the coastgard, and died young leaving family relying on charity. Got a place at uni but couldn't afford to go
Thatcher, father was a grocer. Got to Oxford on a scholarship, studied Chemistry
Major, Parents were in theatre, then ran a garden shop, lived in a rented flat, left school at 16, did a banking correspondence course while failing to get a job as a bus conductor
Blair, Father was a university lecturer, went to boarding school at Fettes, took a gap year then did Law at Oxford
Blair brought in the posh = good, Champagne Socialists era. It's also what powered Labour - the alliance of the metropolitan left and the working class left (the latter having gone to the tories now)
Brown and May had normal backgrounds, but Blair, Cameron and Johnson are very different to Heath, Wilson, Callaghan, Thatcher, Major, Brown and May.
I disagree with the idea that Blair brought in posh = good. To me this feels like a continuation from Thatcher/Major.
Just going on personal experience I feel like 'chavs' had social confidence around the early Blair, and tended to be dismissed late Blair/Brown. By the time Cameron was in office I fell like there was an idea that Eton, private school, investment banking, Mayfair = good, or at least this was stronger under Cameron than Blair. It's all flipped now.
As much as Trump is a golden toilet billionaire, and made elites richer, I'd argue he did not promote the elite. In that elite definitely felt less safe in their social position.
I feel like in the last 5 years or so it has turned to posh is "uncool".
In the US, I feel like they had something similar. Obama was elected in 2008, but some people did have concerns of electing someone unestablished. To assuage these concerns, Obama promoted and kept safe the interests the elite at the time. Not detracting Obama here - that's the position he was in back in 2008 when some would have considered electing a black man to the Office as unthinkable.