It will save the economy billions in allowing people to get to work quicker and so be more productive. It may reduce the number of cars on the road leading to less carbon emissions to help the environment. Lastly it will reduce the number of accidents caused by these dangerous drivers and cause less road rage incidents, which has the knock on effect of not needing as many police and saving the economy more money.
Do you ever get fed up by that pensioner with his flat cap on in a small car driving along at less than 50 mph on the motorway? Its time this is stopped – introduce a minimum speed limit on motorways to forces people to drive at a set speed when the traffic is moving, thus promoting quicker journeys and less queues on motorways as people wont get stuck behind them and slow other lanes down when overtaking.