Further to what Crusoe says, I think an employee in a non-customer service role could be in for trouble if the voluntary saline infusion resulted in them not being able to adequately perform their function (i.e. a data-entry clerk saying “I can’t use my computer today because I am unable to sit down”).
In any case, I strongly suspect that people doing this would just call in sick the next day.
I did a Google search on “saline and scrotum”, and I have to say that this is the most bizarre and incomprehensible thing I have seen in quite some time. (I love this board!)
It doesn’t last forever - the saline is absorbed into the body after a few hours. And it’s usually part of a D/s or BD ritual - not something most people get into right before leaving for the office.