The author cautions against a too narrow interpretation of "Come to me, all you who labor" & then proceeds haplessly to do just that. 

Jesus wasn't talking about labor movements, or even necessarily work for hire, He was talking about all human activity of the children of God focused on doing the good.

That labor may include "work for hire", it may mean house work, the work of family life, it may mean volunteering, it may mean any human activity.

We were put on earth to labor, to work, to subdue the earth (and ourselves, that is our tendency toward self focus, selfisheness, seeking of comfort, etc.).   It says so in the Bible.

We should reflect perhaps this labor day on how well are we "sanctifying" all our human activity, including paid labor. 

We should have a bigger view of labor than what the US national holiday was made for.

Christians should always see things "bigger", through supernatural eyes of faith

How well do we convert our work into prayer, into intimacy with God?