Negatory. With private insurance, benefits are paid according to a contract between you and the insurance company. There is no contract between you and the government. Government can and does give out benefits based on political considerations, and there is no recourse for the poor schmuck. At least if an insurance company denies a benefit, there is the chance you can sue, and people have. You can sue the government only if the government agrees that you can. Once government is in charge of some benefit, it won’t be long before the courts will let everyone on the planet qualify. SSI is a good example. Reporter Jeffery Kay of KCET (PBS of Los Angeles) did a story about SSI and found a married couple who had immigrated from the old Soviet Union where the husband had been a scientist in the Soviet military industrial complex. So, here we have a case where not only were no contributions to American society made, but he actually worked against America (negative contributions if you will).
This is entirely legal because there are only a few requirements to qualify for SSI: over 65, poor (limited assets), and a legal resident. This is why the United States is the desired destination of the world’s elderly; the only thing is they have to be here legally (so far). If this were more widely known by the American people, it would never have passed.