Many of the homeless walked around looking for jobs with their pants pockets turned inside out, a sign of poverty known as

Hoover Flags.

Explanation:

Hooverville was the popular name given to favelas built by homeless people during the Great Depression in the United States. At that time unemployment and misery rates were very high and for that reason many of the homeless went around looking for work with their trouser pockets turned inside out, a sign of poverty known as Hoover Flags.