By “IT” do you mean tech? Because as a software engineer, I’ve seen turnover rates of 1-2 years for some of my favorite people I’ve worked with. If they actually had bargaining power, we know via studies done on unions and turnover rates that these engineers likely wouldn’t dip as quickly and take institutional knowledge and their smart brains with them. Tech is so allergic to unions that it is literally inflicting damage onto itself - managers will tell you how expensive it is to hire new people because it takes months for them to catch up to your codebase, but the higher-up leadership is completely unwilling to listen to the data on how to actually retain people. They don’t care if unions increase productivity or that the elasticity between productivity and salary is >1.0 as the unionisation rate grows (per studies done in Norway), because they don’t want to lose their complete control over companies to collective bargaining.