So you haven't read the link, then.
" Contrary to what people may think, unionised workplaces are generally safer, more productive, more efficient and more profitable with better trained/skilled workforces and lower staff turnover. If that wasn’t enough, pay is up to 25% higher than in non-unionised workplaces and they tend to have better holiday entitlement and superior long service benefits.
Unfortunately, the Tory mentality is pre-programmed to view this as a bad thing, no matter how many facts, figures and statistics you offer them to prove otherwise. They believe that the balance of power in any workplace should be squarely in favour of the employer, irrespective of how unscrupulous or exploitative they may be."
I do not see anything wrong with that.
The Conservatives are making employers pay a decent minimum wage, not the unions, although the unions would prefer a proper living wage.