Mr Dastyari Resigns, page-20

The problem is that if Dastyari was significantly punished (eg expelled from the ALP) for taking money from foreign powers, it sets the precident that would make all the major parties guilty of malfescence. So, they will give Sam a slap on the wrist and wait for the political storm to blow over. Meanwhile, the For Sale sign will be still be on display at both ALP and Liberal Party headquarters.