California has spent billions to fight homelessness. California has spent a stunning $17.5 billion trying to combat homelessness over just four years. But, in the same time frame, from 2018 to 2022, the state's homeless population actually grew. Half of all Americans living outside on the streets, federal data shows, live in California. Across the country, homelessness is on the rise. But California is adding more homeless people every year than any other state. More than 170,000 unhoused people now live here. The problem has gotten worse. Explain how illustrates the policy or practice is effective