Funnily enough, by west-european stardards, PSL would actually be moderate conservatives akin to CDU/CSU and the lighter factions of the Tories.
Nonetheless, even they understand democracy is worth preserving and that a coalition with PiS would mean PiS asimilating PSL further down the line. It should come as no surprise then that the general council of the Polish Peasents’/People’s Party yesterday unanimously rejected PiS’s advances.