[throw-the-towel]

No they didn't. In the USSR, for example, not working without a valid reason was literally a crime (look up tuneyadstvo).

[carlosjobim]

Great point! But for how many weeks will you enjoy your UBI before the rulers say "Okay, now that we're paying all of your salaries, it's time for you to do the work we need. Off you go to build the railroad or the giant dam! Here's a pick-axe."