The Coalition government's Business secretary Vince Cable was given a hostile reception at the GMB annual conference in Brighton when he suggested that new legislation might be introduced if there was a wave of general strikes this year.
Cable defied boos and cat calls to deliver his message that widespread industrial action would be met by a strong government response.
He reiterated previous comments that any major demonstrations would have disastrous implications for the fabric of the country.
"Should there be a wave of large scale industrial action and demonstrations in our cities, with millions of people hitting the streets, our already poor quality street and road surfaces (badly affected by our terrible winter) will get even worse.
The millions of pairs of feet will wear the tar macadam down and will force local authorities to spend more than they can afford on resurfacing".
Cable also suggested that productivity in inner city offices and businesses always took a major nose dive anytime there were demonstrations in the streets as all the staff used them as a excuse to do nothing except look out the window for a couple of hours.