They only have immunity so long as they still control the system. They will likely have as much, if not more, control over the system in a decade. However, if there is a real reform then there is going to be hell to pay. They've done a whole host of things like lying about the tests, compelling people to take the vaccine, lying about the efficacy of the vaccine, lying about the side effect, exaggerating the severity of the virus, etc that would nullify any immunity in an honest court of law.