". But wouldn't they just love the trade unions to be bound by such rules? "

This is unbelievable, don't you realise that the "Unions" are no longer a political force, here or in any other developed country. You are living in a mythical past, the time of mass employment and "organised labour" have long gone. We need to adapt to the future not live in the past in all matters political

If only the "liberal left" were as keen on organisation of social issues they might find a tenantable home.