I accept a discussion about the rates. 

Morneau is saying that people who earn an income at the 53% tax level should pay it. Currently some people do and some don't. That isn't fair; that has nothing to do with the rate.

Another issue is income inequality. That IMO will require higher taxes at the higher income levels. I don't see how income inequality can be reversed any other way. If you think income inequality isn't a problem then OK; but if you think it is then you have to accept higher marginal tax rates.