At the end of the day, most people are employed in part because they want to (or need to) make money.
Therefore, the greatest common denominator for an arbitrarily large and heterogenous group of employees at the company is the paycheck.
This isn't really disputable. Your argument doesn't really counter this fact, either. Sure, UBI might remove that common need that nearly every employee has, which could change the calculus entirely... But we don't have UBI, and the GP wasn't making an argument about some hypothetical world, they were making a point about the one we actually live in.
Therefore, the greatest common denominator for an arbitrarily large and heterogenous group of employees at the company is the paycheck.
This isn't really disputable. Your argument doesn't really counter this fact, either. Sure, UBI might remove that common need that nearly every employee has, which could change the calculus entirely... But we don't have UBI, and the GP wasn't making an argument about some hypothetical world, they were making a point about the one we actually live in.