Ken Livingstone, in his banned book "If voting changed anything they'd abolish it" was able to admire what Thatcher achieved.
(It's always worth picking up on enemies praise).
He believed that before 1979, the UK electorate was like a pyramid where the lowest tier - the working classes - could outvote the middle and upper tiers.
The genius (his word) of Thatcher was she turned it into an egg. Quoting someone saying "If you treat people middle class, they vote middle class".
Form that point on, the middle classes set the agenda.
Now that's up for debate. But someone has to suggest it first. Moreover, if you accept it is a valid theory, then you have to ask how do you "treat" people as middle class ?
Whilst this thread and indeed forum may not be able to resolve those points, I think it's indisputable that someone has (or did) and used those findings to drive policy and presentation ever since.
And it's possible the current electoral swirl has come about because that truism is no longer true ? Remember all parties in Westminster (except Reform obviously) have realised the current electoral system is no longer fit for purpose. And one way to read that sentiment is that the middle classes are no longer winning, If you were unduly cynical. Which, luckily for this thread and board, I am not.