chosen social issues over economic issue.
It's interesting that this is so often treated as such an obviously bad and stupid heuristic. In reality the issue is more likely simply that the views on social issues in question are seen as objectionable (some of them obviously ARE objectionable, of course; others are more debatable). You don't see this argument getting made against rich social liberals who vote for Democrats.
Moreover, social issues (depending on how you define it) can and do have material effects in some cases. If its 1970 and your 6 year old has a two hour bus commute in the name of integration, or if its 2005 and you have to compete with low skilled immigrant labour, your "best interests" isn't just a straight comparison of social programs and marginal tax rates.