i am sure that there are FT' out there that would snitch on
some old pensioner doing unofficial teaching-

There's a huge difference between snitching on an old age pensioner doing a bit of unofficial teaching and someone ripping off taxpayers in your home country.

Ethics, morals, integrity. Three words that we are quick to bemoan the fact they have little meaning in China, yet many Westerners seem to have flushed theirs down the toilet too. That's if they had any in the first place!