They're still paying the price for what the US did to them, I don't think it's too uncommon for reparations to be payed by different people because usually reparations are on behalf of the government itself. If a different government took over the US then I think it would be a bit unfair to expect reparations. But as it stands it's the same government and a lot of the people who took part in the atrocities are still alive today, it's not like it happened hundreds of years ago.