Angela Rayner worked her way up to where she is now. She did not come from a place of privilege, she left school without any qualifications because she was pregnant, but managed to go back to college later on and used that to go into care work. That led to union involvement which then led to politics. She's worked and had to overcome some significant disadvantages to get to where she is now, which is pretty impressive given that she's now Deputy PM.
Keir Starmer also had pretty humble beginnings. He may well be financially comfortable now but I doubt it's millions - apart from anything else the legal work he was doing pre-CPS was more public interest than the lucrative commercial stuff that pays ££££. So if he is a multi-millionaire it would be interesting to understand how he is supposed to have amassed this amazing fortune - because he's not inherited it, and it's highly unlikely he earned and saved.
Both of them have given fairly detailed interviews, especially over recent years. The Rest is Politics podcast covered their backstories quite well.
I think both are very good examples of the conservative value that if you work hard you can better your situation and be successful. Particularly Angela. But the really interesting part is despite having both worked hard, bettered themselves and become successful, the reaction is to dismiss them. People try and pick holes in their achievements, or point out that they don't look, speak or dress the part.
It shows up this long-held tenet of conservatism for the nonsense that it is. Look what happens when two working class kids do what they are supposed to do - because the reality is that they are only supposed to go so far. They're supposed to stop at a socially acceptable level - a manager perhaps. They are supposed to know their place. They certainly are not supposed to overtake the aristocratic or elite members of their generation, and - shock horror - end up in charge. What happens if other people like them get the same idea? It could change everything...