And the police should have been out in force to deal with those who were speeding.
Reducing the speed limit to 60 will mean the outside lane still has people doing 80, the inside lane still has trucks/caravans doing about 50 and the middle lane still has everyone else doing a varying speed between the two. In the same way that raising the speed limit would still have trucks/caravans doing about 50, the outside lane would get bumped up to about 85/90 and the middle lane would still have people driving a varying speed between the two.
As an example, last week driving back down the M1, the matrix board said to slow to 50 as there were pedestrians in the road. I can guarantee you I was the only person doing 50 between that speed restriction.