This is funny the way you are forced to close on a Sunday. Like supermarets, newsagents and in the cities, shops are generally open on Sundays. Where I work we only close Christmas Day. Which is weird seeing as we live in a pretty Catholic country, would imagine more days.
The only laws we have with Sundays is the sale of alcohol. It cant be sold till after a certain time, which I can't think of at the moment.
I think it should be at the decision of individual businesses if they stay open or not.