The untrustworthy are by nature liars and dishonorable cretins who's word means nothing, but broken promises and contracts.

Time and again the liar and abuser of power continuously perpetrate crime and crimes against humanity. 

Deals under the table with them are nothing but collusion in crimes, abuse of power and crimes against humanity.

It is absurd to think that the dishonorable person you are dealing with will ever be capable of honoring his word, especially when he is compromised and not calling the shots.  

The one calling the shots is the one that you are truly dealing with and since that person never holds to his word, nothing he does will be credible.  

Colluding with such dishonorable individuals only makes you guilty too of any crimes against humanity committed and will be committed since the unrepentant sinner never changes his spots.