maybe if calling in sick when you were not sick did not happen on a regualr basis no one would need notes.
Every company is faced with those who will take advantage of sick day policies. They can react in two ways.
They can establish a draconian policy of trying to catch those who aren't sick which will thereby drive up significantly the rate of those who are sick coming to work.
They can consider those who call in sick when they're not "acceptable losses" unless there is clear evidence of fraud (photo in newspaper at a baseball game when you were "sick").
Most find a middle ground between the two. In a safety oriented business, it is wise in the long run to favor the latter. As the Buffalo accident showed, both pilots stated they didn't feel well enough to be there but they showed up anyway.
Because the company decided not to put up with "acceptable losses" in a small number of pilots calling in sick when they weren't, they ended up with the
unacceptable loss of all lives on board that aircraft. In the end, their losses (both moral and $) are going to be much greater than if they'd just had a no-fault, no-penalty sick leave policy. I'm sure those on the plane and their families wish the pilots had been fully rested and well.
Interesting how after the accident the company adopted one of the most liberal no questions asked sick and fatigue policies in the industry. If I'm not mistaken the CPs are prohibited from inquiring into a fatigue call any longer. Call it in, fill out an ASAP, go home. Unfortunately, it will take many more of these accidents for the FAA to make this an FAR, if ever.
Yes, there is going to some fraud. The beancounters hate it. But the alternative has been demonstrated. The beancounters have to be overruled by leadership, which is sorely lacking in the industry.