What is happening to her is that she was not working at all prior to her claim and this indicates that she is not a qualified disabled worker. You must be a worker to get SSI. She has to go through a long appeal process, and may or may not be successful, but I doubt it.. SSI is a temporary measure to pay a person while he/she is recovering from some disability.
I cannot see how this is possibly true. Many elderly immigrants come here and get on SSI disability in a few years. 3 I think. Their children lie and tell the USA that they won't let their elderly parents become public charges. They have no work history here. Chinese and Russians are notorious from pulling this stunt. The children often make plenty of money but get their parents on SSI disability and Medicare or Medicaid
I don't know all the specifics off hand, but you can find it on the Social Security web site.
A person with no work history going back ten years is automatically not eligible. You must be a valid worker to qualify for SSI, it is not welfare, as I said and it is often confused with State welfare programs.