#1 Doctors cover up for each other too much, allowing incompetent doctors continue to practice.
#2 Good doctors sometimes get sued for unpreventable tragedies, and juries who don't understand the complexities of these cases are asked to decide of the doctor acted properly.
As we talk about reforming medical the medical malpractice tort system, maybe we could solve problem #1 at the same time as problem #2.
Perhaps doctors who are currently evaluated as good could be given lower insurance rates.
But capping medical malpractice claims would only serve to encourage incompetent doctors. Insurance companies would have little to lose by insuring them.