Not 45%, no. Being a third and being 45% are very different in terms of power. A third means you have a voice but the other part still has twice the seats you have, 45% means you are basically equal to the other part.
Also, if it was just the 45% worker representation on boards and not the other things I'd consider him traditional left. It is a bit further than what you can find in Europe, but not overwhelmingly so, however all those combined is.