Motorway speed limits? 70 or 80mph?

See http://www.bbc.co.uk/news/uk-politics-15116064 .

Apparently, the government is consulting about whether or not to lift the motorway speed limit from 70 to 80mph. I am against this move. All that will happen is people will drive even faster including 40 ton lorries. Far better, in my view, that they enforced the current speed limits better. I'd be in favour of reducing the limit to 65 or 60mph , which is plenty fast enough.