I honestly have no idea, but I have heard it described as a characteristic of the later period of the union. In any case my point was that when you are forced to have a job you will naturally resist that coercion. The problem here is that there is work that simply has to be done, and when one person is slacking off and someone else has to take over, that feels unfair to the people who have to do more and get paid the same. But this is something that happened both in late USSR and happens in capitalism so I dont know the solution, beyond simply not forcing people to work more than they want to, and having something based on labour time x productivity or just labour time or something like that.