Opposites do not attract in mating game

Opposites do not attract in mating game (New Scientist: 30-Jun-03)
The idea that women are hunting for rich husbands while men choose wives for their beauty is a long way from the truth, suggests a new study… The new study suggests most men and women in Western society look for partners with qualities on a par with their own. Attractive females, for example, are much more likely to seek a similarly healthy and good-looking mate than a rich one. And wealthy males are more likely to seek a rich wife than a pretty one.
Never been a big fan of all these ad hoc sociobiological "explanations". Unfortunately, the people behind the new study have gone on to propose an evolutionary explanation of their own for why people from similar backgrounds get together. Couldn't it just be that people from similar backgrounds are more likely to meet each other in the first place? Not everything has to have an evolutionary explanation.