From the transcript

In some instances, tribes talked to us about the fact that they have— there may be other funding sources but they're not enough to actually serve— they're not large enough, they're not easy to get, and so not being able to use IHBG funds because of the income limit means that they just aren't able to serve those populations. They also talked about the fact that some of their tribal members who may leave the reservation, say, to get educational opportunities, to go to college, they can't come back because there's no place for them to live. They, as you said, are earning just too much and there isn't something available. And we heard the same thing from the Department of Hawaiian Homelands, that they have similar challenges in serving this population. Well, and then you have those who want to try to come back.