That only works for business management and financial services, and possibly politicians. A grandmaster potter and glazer is not going to look like that. A grandmaster soil bacteriologist is not going to look like that. A grandmaster oil painter is not going to look like that. The best butcher on the entire planet might not have a hundredth as much money as the most useless hotel heir.
Besides that, your house, car, and clothing does not leave an indelible and unfalsifiable mark on your outward appearance. Expensive decorations can be faked, borrowed, or stolen. Even if the balance of your bank account appeared as a birthmark across your forehead, ownership of resources is not always a sign of competence. Wealth can be inherited or acquired by chance.
Now, the first thought in your head when seeing someone might be "she's got huge... tracts of land!" But that will probably be because you live in a swamp.
Expensive tailored suit, fist-bitingly expensive wristwatch, huge house in an expensive area, very new luxury car... I could go on and on.