I think you slightly misstate it: they view poverty and homelessness as an outward evidence of moral failures (particularly, an insufficient work ethic) and (often, though this view is sometimes found divorced from religious judgement today) divine disfavor, not as moral failures in themselves.
This has been traced back (both by people who view this attitude positively and by those who view it negatively) to various elements of theology of various strains of Protestantism that shaped American culture, particularly the Puritan concept of “visible saints” whose outward signs were wholesome living and material success.
I might be wrong about some of this. It’s been a difficult subject to learn about.
It's a convenient means to opt out of addressing social ills while simultaneously not feeling like that choice might come back to bite them in the butt someday.
More succinctly: "It is your fault for being a bad person. Society didn't do this to you. Not my problem."
In other words, you don't want to believe that someone else's misfortune might not be (only) the result of their actions, else it calls your own belief about your success into question.
This is why Obama's seemingly unremarkable comments in 2016 about how we all depend on the roads and the work of others offended so many people.
Myself it seems blindingly obvious that I was lucky to be born in a rich country, to have moved to another rich country (USA) and have the benefit of huge investments (physical, moral and financial) by others.
The Protestant Work Ethic measures a persons virtue by how much suffering they endure in their work. The more poorly paid the work is, and the greater the suffering it causes, the more moral the worker. Desire for respite is vice. Desire for pay based on the value of the work being done is greed. Desire itself is far more immoral than any suffering inflicted, and something for which forgiveness should be sought.
For that matter who was the Chaplain at the Center for Disease Control of whom you speak? Does the CDC have a chaplain?
> "Forty-eight US states allowed religious exemptions for compulsory vaccination as of June 2015. In Australia the church was the only group with a religious exemption for vaccination as of April 2015; the government said that it planned to remove it."
https://en.wikipedia.org/wiki/Christian_Science#Religious_ex...