I understand your answer, which was worded quite skilfully.
As far as lowering the limit from .08% to .05% goes, I told you how things work in my province. Despite all of the possible sanctions, a record number of alcohol-related accidents are being reported. It is often said that when criminals are stopped early, they can be rehabilitated and set on the right path. Would a BAC limit of 50 not have a deterrent effect? After all, a limit of .05% is very close to zero tolerance. As far as people would be concerned, an allowable limit of 50 would be close to zero tolerance.