Grenfell: The End of an Experiment?

https://youtu.be/kXSR-Jd25Ds

via Grenfell: The End of an Experiment? – YouTube

What is it that public housing run by government agencies and emergency housing shelters run by churches, which do not seem to work?

Why did it take 2 HOURS for firefighters to start evacuating residents from the Grenfell Tower?