Only through a rhythm of worthy work and reflective rest do human beings grow into moral and ethical people. For individuals to be ethically responsible, their society as a whole must be ethically responsible. No one offered Ruth a pile of food, free for the taking. She was both entitled and obligated to glean the food, even though she did not own the land on which it grew. That was responsibility.
Restful renewal is also an aspect of responsibility.
Ruth, like every other citizen or foreigner, like every worker, even the earth itself and all its life forms, was entitled and obligated to rest on the Sabbath. Time to repose and reflect, time for family, community, and citizenship. But today we keep millions of our people unemployed, and force others to be overworked. For millions, no gleaning. For millions, no Sabbath.