A NYTimes op-ed points out that a substantial part of the American economy is devoted to guard labor:
The share of our labor force devoted to guard labor has risen fivefold since 1890 — a year when, in case you were wondering, the homicide rate was much higher than today.
This seems to be associated with the rise in economic inequality:
But however one totes up guard labor in the United States, there is a lot of it, and it seems to go along with economic inequality. States with high levels of income inequality — New York and Louisiana — employ twice as many security workers (as a fraction of their labor force) as less unequal states like Idaho and New Hampshire.When we look across advanced industrialized countries, we see the same pattern: the more inequality, the more guard labor. As the graph shows, the United States leads in both.