Interesting. I always thought that the class OR gender issues weren't the main point - the main point was that all people are the same in 3 ways: our political/moral views are just elaborate justifications for our own selfish wants, we'll easily throw those views out the window in favor of survival, and none of us are actually happy getting our selfish wants granted - what really makes us happy is purpose, or a goal or dream of some sort.

Both of the characters' views are entirely selfish when we get down to it. She believes the rich should get what they want because she's rich. She doesn't really care about anything else (not even, say, feminism) because it doesn't enable her to get anything she wants. He cares all about financial equality - because he's poor. But does he care about gender inequality? Of course not, because he's a man. All his 'modern' views are just about him getting higher up on the ladder, and he's just as dedicated to maintaining his male privilege as she is to her rich privilege - and he's equally disinterested in the rights of any other group out there (he's not particularly dedicated to racial equality, for instance) because it doesn't benefit him.
Both of them toss out their beliefs of superiority to survive. He works for the worst people in his book (the spoiled, idle, parasite rich - and even women) for a salary, and she works for him (a filthy plebe) to survive when it's her turn. At the end of the day, you just gotta eat.
When she has everything she wants on her luxury boat, she's miserable and constantly complaining. Having any sort of actual goal or purpose - even if it's just to work for a brute to eat - makes her happier than she's been on the yacht, because it's at least SOME sort of meaningful task to accomplish. When he gets to be king of his own island, living in paradise with his woman, he demands they return to the mainland. Why? Because now that he has everything that he could want, he's not happy.

At the end of the day, it seems that she has maybe learned something - because she's not going back to him, but maybe she'll figure out something to do that gives her some sort of purpose. He still hasn't figured it out - he demands to leave when they're on the island, then wants to abandon his wife and kids once he gets back