No, no and no. Call me an idealist. A dreamer. Just don't call me late for dinner.
Warren Buffett disparages America for taxing his secretary at a higher rate than him. Bill Gates gave 50M to nonprofit campaigning for Kamala. I'm not alone here.
There are a handful of people who, to some degree, go against their own class-based self-interests. But they are a minority, often there's some other (non economic) factor involved (e.g. race or sexuality) and often it turns out you can't really trust them, as they have a tendency to revert to their roots (e.g. Chris Hitchens, privately-educated son of an admiral, eventually dropped his youthful pretense at leftism and became the imperialist he was always going to be - same is true of a lot of neo-cons).
You can only really trust people's political allegiances when they are clearly based on self-interest. I admit, a complication is that the definition of "self" is not fixed, as people can have multiple parts to their identity.