Morals are secondary, as they define your strategy, not your tactics.
Yes, Marxist dont act on good morals, they analyse which acts bring forth the rising class consciousness and class antagonism amongst the working class and act accordingly. “Good Morals” is just a byproduct of that process, as is oxygen to photosynthesis.
Its already privatized and mass-privatization in the west (germany) happened in the 90s as a response to the “economical drain” that was “synching the former GDR to the west”. The federal government just owns large shares in DB. In most federal states there are also several other private companies that run trains like SWEG (which is owned by the federal state), which was basically the only company that actually provided train transit to my home region.