We had a similar debate in Ontario recently. It is true that employer contributions represent a considerable tax on labour. On the other hand, everyone is entitled to a minimum pension. Basically, what we are saying is that we would like it to be recognized that companies already have pension funds. We would also like those companies to be entitled to certain deductions for the funds already invested in their own pension funds, rather than having universal contributions that apply in the same way to everyone.
On October 25th, 2016. See this statement in context.