>guess it could encourage businesses to just close.

That's exactly it. Ironic that it's had the opposite effect and had people wanting to work on Sunday.

Anyway, it does kind of make sense from the religious perspective, because Sunday is supposed to be a day of rest where you don't work, so it's essentially the same as holiday pay. But that could also be considered discriminatory, since it only goes for the Christian day of rest. Also redundant, because Mass already has a day of rest law which requires at least 1 day off a week.

All the people calling it regressive to phase out Sunday pay are only looking at it from one extremely narrow angle.