Courtesy of the LA Times:
Seeking tighter controls over firearm purchases, the Obama administration is pushing to ban Social Security beneficiaries from owning guns if they lack the mental capacity to manage their own affairs, a move that could affect millions whose monthly disability payments are handled by others.
The push is intended to bring the Social Security Administration in line with laws regulating who gets reported to the National Instant Criminal Background Check System, or NICS, which is used to prevent gun sales to felons, drug addicts, immigrants in the country illegally and others.
A potentially large group within Social Security are people who, in the language of federal gun laws, are unable to manage their own affairs due to "marked subnormal intelligence, or mental illness, incompetency, condition, or disease."
Seems fair to me. If you are too mentally impaired to pay your bills on time, or make change for a dollar, you probably should not be trusted with a weapon.
In my opinion there are a lot of Americans running around armed to the teeth who really should not even be trusted with a sharpened stick. For example: