Maybe so. I don’t know. But giving trusted status to foreign citizens and refusing it to citizens is not acceptable. Foreign citizens are more likely, IMO, to be susceptible to such “temptation.” They don’t have any skin the game, so-to-speak.
To be candid, that behaviour pattern comes from an attitude that believes anyone with skin in the game is tainted because (s)he has an "interest." In the olden days, it was a rule of thumb used to chase away subsidy-seekers; nowadays, it's used as a way of dismissing out of hand anyone who has something to protect.