I have lived there. There's lots of corruption. TPB admin also had huge drug problem, which most likely is why he chose Cambodia. He didn't go there for any kind of political asylum, he went there to hide from Sweden and to use drugs.
Read khrem440 forums or ask any expat living there.. everyone knew about his drug problems. He also lived in an apartment that cost $750 a month. That's huge rent for a country where people earn like $30 a month.