I think the company is looking at a different cost:

example - 25yr widebody Captain

assume $200/hr pay rate (conservative)

drop one 6CH trip for DSA = $1200.00 - cost to company

(which the "offending" Captain would lose if he is intimidated into not using his DSA bank before retirement)

plus $1200.00 paid to a different widebody Captain that must actually operate the trip in the sick Captain's absence.

total cost to company is 2 x $1200.00 = $2400.00

vs. your $100.00 doctor (intimidation factor) fee

which do you think they would rather pay?

$2400.00 could pay for the intimidation of 24 widebody Captains (at $100/sick note request) - if they can intimidate more than 2 to not use DSA again - they are money ahead.

& this example is just on a 6CH trip. Consider the savings to the company for intimidating a Captain to not call in sick for a week-long 777 international trip.