It is no more shallow to date someone based on the amount of money they earn than it is to date someone because of their perfect abs.
Probably less shallow, now that I think about it: At least the money implies a certain amount of self-control and a talent for earning money(Unless they inherited it, which in the case of a Doctor is probably not the case).
To the OP: If you're looking for wealthy people to date, try going to places where wealthy people congregate. Doing volunteer work is a big one, or volunteering for a political campaign. Church is also a big place where wealthy and those who aren't wealthy rub shoulders.
I should point out, though, that looking like a model is probably not enough to get the best of the wealthy. It is an inherently depreciating asset - You will deteriorate in looks while his money will probably appreciate in value over time, meaning that unless he plans only a very short fling with you, your personality will be important.
I would recommend reading, "The Dallas woman's guide to gold-digging with pride." - It's not only hilarious, but it's fairly insightful.
It's a fairly well-known book amongst a certain set - Specifically, the people you want to date.