According to Romans 13:5, the "compelling reason" to inform the authorities is not fear of punishment ("the wrath"), but rather on account of one's conscience - the knowledge given to us by God of what is right and wrong, wicked and just.
Ngokusho kwabaseRoma 13: I-5, "isizathu esiphoqayo" sokwazisa abaphethi asesabi ukujeziswa ("ulaka"), kodwa kunalokho ngenxa kanembeza womuntu-ulwazi olunikezwe uNkulunkulu lokuthi yikuphi okulungile nokungalungile, ababi nabalungile.