Respuesta :
though a bit lengthy (which is absolutely fine!) you seem to go into some good detail while withholding main points for the rest of your paper and it is very well done!
TBH this was rlly good. It seems pretty long, though, for an intro. Maybe you could try to split it. I think you could start a new paragraph from where you said, "Since the 1930's, Canadas welfare system has undergon several significant....."