Then why doesn’t Canada have a huge network of ethnic grocery stores tailored to more frugal immigrant communities? I assume it does and the issue is one of consumer education.
They’re all over the US in every state with a decent immigrant population. Mexican, Persian, Armenian, Russian, Chinese, Vietnamese, Japanese, Korean, Arabic, and so on - that’s just the ones off the top of my head that I shop at monthly.
Chicken is usually cheaper at Costco and milk/eggs/cheese at Trader Joes, but all other meat and produce is significantly cheaper, on the order of 2-3x lower than the price at Costco/TJs. Their produce varies more based on whats in season and what their suppliers have the most of, but they also have crazy deals every week. My favorite this year was rebranded Sumo mandarins that sold for $0.33/lb which everyone else was selling for $2-3/lb (I was eating 3 pounds a day for a month).