experience points
it would be smart if people didn't have birthdays, but instead we all had experience points. Think about it. Im sure theres a 15 year old out there somewhere whos wayyyy better at driving than i am, so why shouldnt he be allowed to have his license when i can just because i've lived a certain amount of years. Instead we could all just take tests and earn experience points for different levels and accomplishments in our lives, like pokemon for people