Means, motive and opportunity are universal necessities for a crime to be committed. Whether you're on the border or in a Wall Street boardroom, it's the same. Generally, the largest barrier to overcome in influencing officials is gaining a significant familiarity with them. Companies with significant interests in legislation hire lobbyists for this very reason.

To answer your question directly, a person's family origin has no bearing on their trustworthiness. It's simply a function of numbers, the more you have of a particular group, the higher the odds of having bad apples from that group.