Not like cultural and entertainment locations, businesses need to be closed on Shabbat. Not for religious reasons, but for socialist and cultural reasons. It is important that there be a day of rest for everyone, and a day off on a different day is not the same as a shared day off for everyone.
A day off from buying is also a healthy idea. The makolet owners are right in their claim that the large chains unjustly destroy competition. Correct, people will have to take care of their shopping on Friday. But from the other perspective, they won't need to go shopping on Shabbat.

  -- MK Meirav Michaeli (Labor)

If the long weekend movement should ever succeed and turn Sunday into a national non-work day, Michaeli's argument will have to be adjusted.