The labor movement didn't fight for 8 hour days so people could fight for ten. Do you want child labor again, too?
Labor unions fought to reduce workweeks to 40 hours. The 8-hour day came about as a means of getting to 40 hours.
So no, I dont think that my idea of redistributing the 40 hours so it results in more consecutive hours off work is going against what the labor unions fought for, which was the elimination of working 6 days a week for upwards of 16 hours a day.