This is because those provinces have allowed Canada to collect their provincial sales taxes for them. You aren't a surfer waiting for the wave to come in. There isn't a evidence to prove this unique. Canada has what you might call a national sales tax or a value added tax https://kinhgnhiemlode.weebly.com/kinhgnhiemlode-blog/chia-se-cach-tinh-tai-xiu-bong-a-cho-nguoi-moi-tu-a-z