Here's an interesting article on some recent studies done by Stats Can regarding corporate tax cuts:
http://www.theglobeandmail.com/news/...service=mobile
- constant debate between pro-business types/conservative policy makers and pro-labour types
- companies haven't reinvested tax cuts into their business since about 1990
Some other stuff that touches on some of what is being discussed here, but overall the evidence seems to suggest that corporate tax cuts haven't benefitted Canada for multiple decades.