The thing is, it partly depends on how you feel about societal well-being in general. If you believe these folks are valuable contributors to society, then you should naturally also believe it's important to help them continue doing so in ways that are not hazardous to their health, demeaning, or cause societal breakdowns (homelessness, drug abuse, child endangerment, etc).

If you don't believe they're valuable contributors, I challenge you to describe how any high-CoL metro would successfully function without blue collar service workers.