Not really. The highest sales tax is 15% (NB, NL, NS, PEI).
I'll grant that's higher than in some US states, but come over to Europe where VAT is usually 19-25%. Although at least in Europe prices are advertised including VAT, so no mental math is required to calculate how much it will end up costing.
That certainly changes the cost-of-living, but it's not really relevant to the point about exchange rates and price differences, since most people compare prices pre-sales tax.
Sticker prices, in the US and Canada (and Europe?), don't typically include sales tax.
I'll grant that's higher than in some US states, but come over to Europe where VAT is usually 19-25%. Although at least in Europe prices are advertised including VAT, so no mental math is required to calculate how much it will end up costing.