SD
Try doing some research on fatigue and flight/rest patterns. There is enough of it out there, in fact I took part in one university study.
The existing rules were written a long time ago when things were very different. All the recent valid and relevant research is almost totally ignored by the CAA and by companies as well. Not to mention the attempts by the EU to 'harmonise' FTLs, for harmonise read lowest common denominator.
Your comment about the IRA cartels makes you look stupid as well as ill informed.