I can't believe no one brought it up here. If you do well, especially if you live the high life, how could you have not run into a couple of those? If you don't mind them, no need to read on. There's probably more guys than gals here, but I think everyone could contribute to making a comprehensive "Gold digger screener", girls and gay people may offer unique insights. My two cents: high risk areas: business and top class (and airport lounges), hotels, certain towns... high risk groups: girls dress in certain ways (don't have the vocab, but you know what I'm talking about), girls who keep certain company... preventive measures: find out if a girl has something going for her (those who work certain professions such as doctors, teachers, etc...), some more intrinsic qualities such as compassion, intellect ... if she's ok with being just a f-buddy. Also maybe projection of certain energy when you are about to have sex for the first time with a non gold digger. I personally don't even own a car, keep two places (nice Zen like one deep in the sticks, crappier one also Spartan has nothing of value in a ok neighborhood, any self respecting burglar would regret ever breaking into it), dress anything female friends don't comment as atrocious. So to me it's not a huge problem, however some good ones can still smell it. One just asked me outright if I'm rich, my answer was "your honesty is refreshing". ps: I suspect most of us are fairly unemotional and ruthless. If you are, have you noticed that you have a tendency to attract overly sentimental girls who want to "covert" you?
I am not sure why OP blames them. After all you don't go out looking for ugly women or for a mate with no redeeming values, so why would it be different for them? There is a saying, don't get mad, get even. They want your money? Get even and want them just for their beauty and cooking skills!
Maybe all you got going for you is your money. But with a stingy side it seems. So they won't bother you for long. They all have different personalities and agendas which can change. Marry your housekeeper/children minder and have fun with your mistresses. Make sure they know that is the setup.
Why not just let them believe you're rich (whether true or not) and have your fun with them. Women like that shouldn't be taken seriously, they're trying to use you so it's only fair you try to do the same.
Reminds me of the old Rodney Dangerfield line..."When I was a kid, I was so ugly my parents used to tie a pork chop around my neck to get the dog to play with me." Maybe you could tie a roll of currency around your neck to test your premise.