Given that homelessness is at record highs, I wouldn't worry too much about those with more homes than they can use; I think they'll be OK.
Well, apart from that homelessness is not just a housing problem[0], and that homeless people in Western countries are substantially more likely to have alcohol and drug dependence than the age-matched general population in those countries, and the prevalences of psychotic illnesses and personality disorders are higher.[1]
Of course there is the idea of "housing first"[2], 'the idea [to] help people find permanent housing right away, without conditioning this housing on sobriety, mental health treatment, employment, or anything else'.
...aaand then it ends up being political.
[0] Homelessness Is Not Just a Housing Problem https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2605901/
[1] The Prevalence of Mental Disorders among the Homeless in Western Countries: Systematic Review and Meta-Regression Analysis https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2592351/
[2] https://www.theguardian.com/cities/2014/oct/20/housing-first...
All fun and games till they come for your stuff, with the same argument. As someone with a first hand experience in that, I find it extremely peculiar these arguments are almost elusively made by 30 something year old white kids that grew up in upper middle class US suburbs.
Most modern disestablishmentarian movements simply exploit minorities and claim to speak for them, but dont actually represent their views.