Graphs. Executives love graphs. Numbers also mean different things to them, and changes better invoke noticeable change, preferably monetarily and with some sort of proof. This is for those quarterly meetings. Larger layoffs are often done for investors. It's a clock's pendulum. Pull back payroll, show the numbers and talk about skimming the fat or whatever, yell "look at us!", profit. Hire a bunch of people, talk about a big product/project, yell "look at us!", profit.
It's the capitalist endgame. You, I, little Johnny, and the kitchen sink if it could talk and move, are all numbers on an excel sheet. Plenty of exceptions exist, this remains the rule, however.