Remove the requirement of a bachelor's degree for acceptance into medical school. Integrate anything they see as necessary into the medical program itself. That's 4 years of their life they can have back.

I had a friend that went to a prestigious European medical school for a 6-year program right out of high school. Is he any less qualified as a doctor than someone that spent twice as long to get to the same point?

Or compromise and make the students prove themselves for 2 years before being accepted into the med program. 8 years, they're done and "well rounded".