If anyone thinks it's too far fetched...
https://www.newyorker.com/magazine/2017/10/09/how-the-elderly-lose-their-rights
Read this and see the courtroom descriptions, and how some of the elderly were "diagnosed." Then how the police washed their hands of it. If anything, comparing this to what the Shafer guy and his people did, the extent of the operation is actually underplayed in the movie, with the reality being much worse.
Pretty much a legalized racketeering operation. Some of the minions that drew too much heat got arrested but the main guy is still at large and continuing to do this. Nothing happened to the corrupt judges or those that were signing off the certificates.