The number one issue I believe we have today is a rising amount of homelessness. A lot of people and families are out on the streets. Most cannot get a job because they do not have a home, shelters only allow them to stay for so long before they have to leave. With concrete homes it's an idea that would not cost much to construct a home for homeless families and individuals and get them back onto their feet.
I have stayed in Skid Row in Los Angeles and in Las Vegas. 2 places where I have never seen so much corruption using the homeless for others personal gain. You have the shelters which receive funding to house the homeless but most treat them like garbage while they stay there. You have the police force that is quick to write a ticket for a homeless person sleeping on the sidewalk at night.
With my idea of concrete homes they would be quick to build, cheap to make and would get a lot of the people in need of housing off the street and back into mainstream life.