Economic instability has been found to increase overall mortality, infant deaths, fatalities from cardiovascular disease, cirrhosis, suicide, and homicide as well as morbidities, alcoholism and admissions to mental hospitals. M Harvey Brenner has publications studying the phenomenon going all the way back to the 50s if you're interested in the scientific literature.

More people unemployed, more people without money, more people being poor. More desperate people, more sick people, more angry people, etc..

Probably suicide or stress related