Where are you finding these people under 'extreme stress all the time'? I rented for a few months in a place where most of the tenants were on some kind of social welfare or awaiting the outcomes of disability cases (for years) - 'stressed' would be the last word I'd use to describe them and 'lazy' would come much closer. But hey anecdotal experience: do you have a citation for your claim about the stress levels of those living in poverty?