The Alberta PC's(progressive conservatives) had something like 40 years in power. Lot of good leaders, lot of really good stuff done too. The last leader in power? Alison Redford, not so much. Corruption would be far too simple as a way to paint it. Nepotism is too simple as well. If I said that she treated the province like her own personal fiefdom? That would also be too simple. All of those were in play, and the entire thing exploded and the PC's lost power rightfully because of that. I would have been happier to see Wild Rose come into power, but they're still very new to the political scene and you could see that. The entire thing is just a gigantic clusterfuck, AB hates the Liberals with a passion because of what Trudeau Sr. did back in the late 70s with the national energy plan. The NDP had never held power, but this is pretty much the same thing that happened in Ontario back in the 90's I think it was. Liberals were corrupt, the PC's fucked up everything as well. The only option was the untried one and as people have seen, it's leaving nothing but heartache, empty pocketbooks and a world of hurt. And well, every place that the NDP have gotten into power has been a gigantic mess as well. We're likely to see populist leaders start rising here in Canada soon because of all of this garbage though. And if Trump is successful in his whole "US first" policy I wouldn't be surprised if it happens faster.
If you want to read more on the Redford stuff this article will probably help.