nkf story - the wayang continues

Is the $20k payment for work done? When David Tan was given the $20k by Durai, he was elated. It was reported that it was a token of appreciation for fundraising. Now it has become payment for consultancy work done over cheap chicken rice. The chicken rice was only the appettiser. The $20k was the main course. But why would David Tan return the money to NKF when he was questioned by the authority? Didn't he has any clue whether the money was payment, token of appreciation, legitimate or illegitimate? What a big puzzle. The recipient of $20k, told to raise an invoice which he did not know for what, returned the money and now admitted that it was payment for consultancy over chicken rice. What kind of wayang is this?