Don’s salary was 24.7 times greater than Peggy’s

Season 1 episode 11 we see Peggy ask for a raise, revealing she makes $35 a week. In an earlier episode Don is given a raise to $45k a year, or $865 a week. That's the equivalent of someone today making $50k a year and their boss making $1.23m. Probably pretty common today in finance and tech but I can't imagine an advertising agency having that discrepancy between a secretary and a middle manager.