I have watched, on multiple occasions a movie that is about a choir of homeless people and now I'm wondering if the movie is loosely based on this real life choir you mention. I normally don't re-watch a movie but I have seen that one many times because it shows what reform is possible when people are convinced that they matter.  I especially like these two quotes from your article: "What a powerful affirmation of identity and belonging". and "to get the very best from our people, we need to step away from the team and connect with them as individuals". All the affirmations about someone mean nothing unless they internalize them and believe them. It takes the personal touch for that to happen.