Before you posted this I decided to pop over to our HR department, a large MNC, and find out what they thought of mandatory union recognition. Their immediate reaction was that it would result in initial hiring of consultants to deal with unions and train HR staff, so that blows that theory out of the water.
And they only deal with unions when they want to, not when they are forced to do so for every possible matter. Companies do not need unions to help them find the right levels of pay for their staff, this is pure nonsense.