The only part I disagree with is stone/pounds for people’s weight. Although we use stone, I’ve never heard someone use pounds… Maybe if you’re in Weight Watchers or something, but otherwise it’d be rounded to the nearest half a stone (e.g. 9 and a half stone)
I think a major issue is that if the corporation cannot find work for all of its employees, how will it pay them? And since, presumably, there will be admin staff required who also need to be paid, the amount this corporation will charge the employers of the workers will have to be more than is paid to the workers. If this amount is significant, employers can poach employees from the “union corp” by offering more money, while still saving themselves money.