For every action, there is an equal and opposite reaction...
What do you suppose Delta will do when the sick leave investigations result in huge numbers of disability claims because of what they discover in reviewing the medical records? What are the projections for the growth of the SIC category? How many more pilots will the company have to hire due to lost medicals? Will the unintended consequence of reducing sick leave actually cost more in disability and lost productivity? There will be far fewer staying til 65 with this level of medical record intrusion.
If I show up well for a trip, but suddenly develop (insert random illness) on the flight to XYZ, is it an OJI claim? Is an illness during a rotation handled differently than a sick call prior to sign in?
Pre C2012, I flew with a captain who should have called in sick. Under C2012, I'm sure he would have used his sick leave. Under TA2015, I would expect he would have made the same decision as pre C2012 and flown sick. The result of not calling in sick was a hospital/Dr visit in a foreign country, Intl DH for a replacement Captain, a fantastic layover for two FOs who spent the extra time buying their own beer.