Having spent more than 18 years life in army background with family from both maternal and father side served in army, I have never seen or heard any officer selling army liquor to make some money. Yes there had been many instances where officer offer liquor as bribe to civilian to get his work done.
Regarding your allegation on command building or office building renovation its all being done via MES hence Infantry officer making money out of it is very rare.
Being Army brat myself for which I am proud off, I never made through SSB even after clearing NDA, IMA and OTA examination multiple times, it wasn't just only me, many of my other friends from army background never made through. So please stop making false allegation.
Lastly for use of government cars for family use, can you name any one organization whether government or private where organization cars are not used for family purpose. I am not supporting such practice but why single out only army for it just because there vehicle stands out from the rest!
In regards to favoritism/politics let me state quote one of senior" Politics start once your are more than two" accept it as universal truth and live with it.