I never really understood the cheap money argument. Big tech doesn't need to take on debt to expand, so why would it matter what the interest rate is? I also d

I never really understood the cheap money argument. Big tech doesn't need to take on debt to expand, so why would it matter what the interest rate is? I also don't understand the notion of "overhiring". Tech doesn't just hire people without having anything lined up for them to do. At least not en masse.