Christmas Bonuses for public employees, or bonuses of any kind, violate state law (Article VIII, Section 1 of the Constitution and the Wage Payment and Collection Act) when there are no written employment agreements spelling out such bonuses, along with measurable results required to obtain said bonuses.
A largely unasked question is becoming glaring: Is Illinois doing all it should to use artificial intelligence to make government cost less and work better? So far, the evidence says no.