For more than a decade, economists, lawmakers and others have heralded the nation’s economy, often citing how unemployment has declined as new jobs have been created, or Wall Street trading and major bank profits rise.

Some might be led to believe that all is well in America. But as Sportin’ Life in the folk opera “Porgy and Bess” sang, “It ain’t necessarily so.”

On Sept. 16, California Gov. Gavin Newsom, joined by other California city and county officials, wrote a letter urging President Trump to recognize homelessness as a “national crisis decades in the making that demands action at every level of government.”

“Mr. President — shelter solves sleep,” wrote the California officials, “but only housing solves homelessness.”

Gov. Newsom and company were absolutely correct. State and local officials across the country also reckon with limited resources to house the nation’s half million homeless people and its accompanying persistent poverty.

America’s homeless are a visible reminder that not everyone has been a part of an economic recovery.

In 2018, 67 percent of America’s homeless people were individuals. The remaining 33 percent were families with dependent children, according to a report by the National Alliance to End Homelessness.

Further, according to a new 2019 report by the Annie E. Casey Foundation, “Our nation is currently in the midst of a long period of economic expansion. Yet stagnant wages, rising housing costs and inaccessible job opportunities keep many children and families trapped in impoverished communities. And despite economic growth, we have not seen significant reduction in poverty.”

Despite the availability of homeless and poverty research, HUD Secretary Ben Carson sent Gov. Newsom a stark rejection of California’s appeal for federal financial assistance to alleviate California’s homeless.

Secretary Carson’s Sept. 18 reply said in part, “California cannot spend its way out of this problem using Federal funds ... More vouchers are clearly not the solution the State needs. To address this crisis, California must reduce its regulatory burdens on housing.”

Advocates for homeless and low-income people strongly disagreed with Secretary Carson’s assessment.

“We know that the number one cause of homelessness is the lack of affordable housing,” said Megan Hustings, managing director of the National Coalition for the Homeless.

“Consumers are already struggling with crushing debt from student loans and medical expenses, or facing triple-digit interest rates when they attempt to access small dollar loans,” noted Marisabel Torres, director of California policy with the Center for Responsible Lending. “When they also have to pay some of the highest housing costs in the nation, it is unfortunately unsurprising that there are such large numbers of homeless people in many of California’s large cities.

“California’s homeless may be the largest by state,” Ms. Torres continued. “But the problem is a national one that deserves to be recognized and acted upon.”

In 1987 there was an expression of national will to respond to America’s homeless through enactment of the McKinney Homeless Act. That statute created the U.S. Interagency Council on Homelessness dedicating the ongoing support of 19 federal agencies to prevent and end homelessness. HUD is one of the participating agencies. The Council on Homelessness even has a written plan, “Home, Together,” that lays out federal remedies over the fiscal years of 2018 through 2022.

According to the 2018 report by the Council on Homelessness, “Crisis services are the critical front line of communities’ responses to homelessness, helping people meet basic survival needs while also helping them swiftly secure permanent housing opportunities.”

Someone should give Secretary Carson a copy.

The writer is communications deputy director with the Center for Responsible Lending.