Why does Chicago salary database show such high pay for some aides to aldermen?

Invention on Instagram: "In 2013, IBM scientists created A Boy and His Atom, the world’s smallest movie, by moving individual carbon monoxide molecules one at a time. Using a scanning tunneling microscope, which can magnify surfaces over 100 million times, they positioned 65 atoms to form shapes and patterns that came together as frames of a stop motion film. Each frame measured just 45 by 25 nanometers, so small that 1,000 frames could fit inside a single grain of salt. The achievement was reco