From what I have seen that is not true at all. You have to remember that the money originally went to only the county, this was before the state took it over. So when I went to Jordan Creek or Merle Hay and purchased stuff, this paid for the schools in the Des Moines area. That has changed now, but that was only after pretty much all the urban schools had built new buildings or remodeled what they had.
Many small schools are playing in gyms from the 50's or earlier, very few turf fields for football. Some schools used that money to go one on one for computers or chrome books. But rarely from what I have seen was it spent on sports facilities.
Don't get me wrong, I think this is a great decision by the Des Moines schools, but I am afraid they are fighting a losing battle, at least with football with the suburban schools. Des Moines would be better off running 2 or 3 programs instead of the current 5 they have. Merge, Roosevelt, North and Hoover with East and Lincoln for football only. That would allow them to get numbers closer to what the suburban schools have.