That they are carrying out dirty tricks like fake death threats
That wasn't PiS, that was the (not yet registered) openly pro-Putin party Zmiana. They have their own KOD impersonating group on Facebook and claim they are the real KOD. Russian trolls are fanning the flames.
wyborcza.pl/1,75478,19369931,trolle-z-proputinowskiej-partii-mateusza-piskorskiego-podszywaja.html
Morawiecki gave up his 2 mln a year job to work for the government
So he thought he got a better deal. I don't see how this is a sacrifice. Similar to how Wojciech Jasiński, poseł PiS discarded his Sejm membership for a cozy position as the head of Orlen. Yes, 3 days ago he became the chairman of the huge petrol retailer.
Wojciech Jasiński is 67 years old. He was a member of Sejm since 2001. He has very little business experience, mostly in communist era in copartnerships like "Społem" and Spółdzielnia Transportu Wiejskiego, as well as Srebrna (strong ties to PiS, including Jarosław Kaczyński). He wasn't chosen in a contest, he was appointed. He was also a PZPR member, and he joined after 5 the pacification of the worker protests in December 1970. At the time PZPR was changing the PRL Constitution, adding gems like "PZPR has the principal role" and "unbreakable polish-russian friendship".