Before I can take anything you've said as fact, I'm going to need a link a news site that ran this story, or if there is none then a picture of the newspaper article (with enough visible information to determine it is from a specific page of a certain newspaper) will do fine.
Anyway, I am a believer in physical magic, though this does seem like an unusually blatant use of it that is going to attract some attention. To me, that means that whoever did this is either did not think this through or doesn't care about these people being found. Since greed and corruption in general tends to lack a genuine motive or end goal (they take money for the sake of it and treat it like a drug), I would suspect that this spell or whatever is designed to harness their greed for a particular purpose, such as to gather money for someone else. Or perhaps this spell is designed to target corrupt people and effect their health.
Of course, there is also the chance that this isn't a spell and has no caster. Everyone has the potential and energy for magic, so it possible that we are witnessing a side-effect of these people's corruption. When my energy is out of balance my health tends to be effected, I can only imagine what the energy of people who have completely given in to greed and corruption, but never achieve what they truly desire, is like. In such a case, doctors would probably diagnose this as a psychological problem that is effecting their physical well being.
Keep us updated on what's going on, I'd definitely like to see the end of this story.