It certainly wouldn't help the economy. In France, there are still laws against retails shops being open on Sunday. Many retailers are working hard to get these laws repealed...
Personally, when I moved from a large city to a medium sized city, I was shocked to find that many places here don't open till 9am or even 10am

: and close early (by 7pm). When you work all day, it's impossible to get to the store during those hours.

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