What is Lee's purpose for the allusion to the WPA and the Ladies' Law? What do they signify?

These references give the reader further insight into who Bob Ewell was as a person. The WPA was and organization that was set in motion to help people find jobs. The economy was a mess, people needed to work...... Ewell was fired by the WPA because of his incessant laziness.

The Ladies' Law, again is used to reflect Ewell's personality and his treatment of Tom Robinson's wife. The abuse and torment he inflicted upon the poor widow led Mr. Deas to threaten Ewell with prosecution of the Ladies' Law, women were to be protected, and this law would put him in jail when enforced.