There have been recent studies that show women care about a man's resources less in societies where they have better opportunities to earn their own money. There is even evidence that whether men prefer women to be more skinny or plump depends on the economic climate. What is desirable to either sex is not set in stone but rather changes to adapt to the situation.

Also, we're speaking in generalizations. Everyone is different and wants different things, and we're all free to be attracted to or reject each other for any reason we please.