Actually, healthcare access has improved for everybody in the last 60 years, enough so that life expectancy has increased by 10 years.

Homicide (and presumably other violent crime) is about the same as 1950.

Further, "poor" people have always had lower social status and higher stress, so there's no change there.

In 1950 it wasn't uncommon for people to still use outhouses and not have electricity.

Life expectancy reference: http://esa.un.org/unpd/wpp/unpp/panel_indicators.htm

homicide rate reference: http://www.infoplease.com/ipa/A0873729.html