When tech companies pay out billions and billions more per year in salary which end up in rent or mortgage, we should question why they don't decide to move par

When tech companies pay out billions and billions more per year in salary which end up in rent or mortgage, we should question why they don't decide to move partly or expand largely elsewhere and save those billions. They must know that a lot of talents will follow them to whichever city that has reasonable living conditions. My suspicion is that the system serves as a golden handcuff. The elite tech workers feel like they are getting paid a lot more, which they are, but they still cannot retire or pay off mortgage easily. So they need to continue to work diligently at the company for a long time. This reduces turnover and keeps experienced workers happy and handcuffed. Downvoters: Please give your reason why you think the theory is likely wrong. There are many nice, much cheaper areas that these companies can expand to. Many groups can function without always connecting with the headquarters.