Social loafing model is always a bit iffy, because it’s always presented with the tone of ‘how do we get the team to work at 100% efficiency all the time?’. Workplace psychology like this is often about improving capitalist efficiency (or reducing stress, but only insofar as to maximise work output e.g.: Yerkes and Dodson’s Iverted U Hypothesis). It carries the creepy implication that best way to squeeze the maximum work from your workers is to have them believe that each worker is on their own.
Whereas, as social animals, we know instinctively that, if we are working with someone else, we don’t need to put in all of the possible effort, because other people have got our back. Two people pulling at 82% efficiency is still 164% of what one person can do alone. Social loafing, as a term, implies laziness or indolence, which is a very moralistic way of condemning (checks notes) collaborative work