In Canada, they made these agreements to force my people onto small reservations with limited supports, services or funds. Part of my treaty heritage is that we get an annual payment for signing onto the treaty - everyone gets a bit of money every year. When they signed onto the treaty in 1904, they agreed on giving $2 per person every year ...... we still get that $2 every year. Every other historic agreement with the Royal family or international agreement is adjusted to inflation .... but Indian treaties (they're called 'Indian' because that is what the original term was, so it is kept in use when referring to treaties) they all remained the same.

They can adjust agreements made with Europeans to adjust with the times

They don't, won't or can't adjust monetary amounts when it comes to Indian treaties in Canada.

.... but the main reason why they even settled on these treaties in the first place was that it was planned, hoped and encouraged and expedited to have all 'Indians' either die, disappear or become naturalized as just Canadians with no land rights within a few decades .... 100 years ago!