My friend's (upper middle class) dad is a very significant Labour politician in the House of Lords. He is by far the richest person I know. But he's not a "hard lefty".
I think it's a bit silly to be "hard left" and rich, as you are supporting what ought to go against your own self-interests and financial and social stability.
I'm normal middle class, but I'm very soft left, and socially conservative. I tend to describe myself as a "Christian Social Democrat", if you get what I mean.
Christian Social Democrat used to be the common man over here. Then the far left hijacked everything.