She may or may not have been his daughter, but is at the very least, his'"Cousin".
Do the 'descendants'?, of all people whose images are used on banknotes request, or receive financial gain from the use of those images?
Most aboriginals who seek to see the self image, and broader communities' perception of aboriginals, enhanced, by recognising the contribution made by people such as his uncle, would accept that alone as a significant benefit.
This leads us to question whether he is just a greedy, selfish, and self interested jerk, whose actions could be said to be having the opposite effect than that which we have seen from the respect shown his uncle.
The only thing I would give him would be a swift kick to the 'goolies'.