I’ve been practicing the mercenary method for about 5 years now. Since then I’ve significantly increased my salary and I’ve been a lot happier at work. That on top of learning to say “no” has improved my career life exponentially. NO loyalty. No unpaid overtime. No going above and beyond for a company that isn’t going to return the favor.
If I truly felt a company, or someone at the company, cared for me and my career I’d have no problem putting in the extra effort. Unfortunately it is a rare occurrence and most of the time decisions are revenue/cash flow related and it doesn’t matter how much a company cares. At the end of the day, no matter how good things are where you work, it’ll always come down to the bottom line and what value you provide vs what you are costing the company.