wfb and flu:
Standardized nationwide tests would indeed be worth considering for a lot of fields besides the current CPA and Bar exams. Noted author Charles Murray (wrote the influential book Losing Ground), believes such tests could apply to many fields.
They would also serve as the organizer for the self-taught college grad, or “master of a discipline” or whatever one wants to call this certificate. The resulting test score would be a credential that person could take into the job market–let the employer decide. Of course, existing faculty would see this system as a job threat and call it inferior.
Some people can indeed be self-guided learners and want to short-circuit all the party atmosphere, political correctness, and waste inherent in 4 – 6 years of college classes.