That's why our system is screwed up; the Constitution says To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries;
where we now have, effectively, an unlimited time span. (And yes, I do blame Disney and the Supreme Court.)
I do not disagree with you on that.
But, if Elvis Presley’s grand children can live off a dead man, these people should able to live off their dead great grandmother.
That is assuming that the old lady did not sign away the right to her likeness. But even if she did, Quaker will likely be writing a check.