Homeless people and patients in mental hospitals don't pay many taxes and most rarely vote. Politicians are not likely to go after the "Homeless Vote" or openly claim mental patients as their main constituents. This is true no matter which of the four leading political parties you examine - the Democrats, the Greens, the Libertarians, and the Republicans all behave as if homeless people and mental patients don't even exist (except as problems to be cured, of course...).
My point is that you're not likely to see any politician interested in sponsoring or running an undercover "sting" operation to catch abuse of homeless people and mental patients, because these people just don't seem to matter to any politician or political party.
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The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.