I don't see how such a system could be implemented in a meaningful way. If any system would have a chance of being supported by the US government, then it probably wouldn't rule out the bad behaviour examples you give. If by some chance it did anyway, it still wouldn't be likely to apply to many parts of the world (or at least would be unenforced).
Also, since you mention doctors and lawyers, it is my feeling that many bar associations and state medical boards are more interested in protecting the finances of their senior professionals as well as their own organization than the public that they should be serving. That is not to say that I feel we would be better off without those organizations (certainly not in the short term), but it makes me hesitant to want to see such organizations brought to any more fields.
Also, since you mention doctors and lawyers, it is my feeling that many bar associations and state medical boards are more interested in protecting the finances of their senior professionals as well as their own organization than the public that they should be serving. That is not to say that I feel we would be better off without those organizations (certainly not in the short term), but it makes me hesitant to want to see such organizations brought to any more fields.