Personally, I think the government was just trying to wipe First Nations out by whitewashing them. I bet a lot of deceased children were just discarded like garbage. Terrible.
The elephant in the room with this series of unmarked graves stories is that there is no beneficial reason to the various FN reservations/tribes to have these children found, buried, and that chapter put in the past. The money, for lack of a better way to phrase it, is in the continued victim label staying on top of the news stack.
Between the government and FN leadership, FN's will be victims for the next 200 years.