Do you think there's doctors out there that hand out more medical cards than they need to because they get kickbacks from dispensaries? Sounds like a conspiracy to me lol.
In California I know for a fact that MD's are not allowed to have ANY ties to any dispensary whatsoever. If they are getting kickbacks from a club then they stand to lose their license to practice and have criminal charges filed against them. That said, yes I do believe that it happens all the time. It's unethical and illegal, and any doctor that does that should be reported to the California State Licensing Board.