If someone making 5% more than you is what makes you unhappy and bitter towards your job, I might start thinking about doing some internal reflection about what actually matters in life and change what makes you happy.

Don't get me wrong, I'd love to be the best paid, but it's not what makes or breaks my happiness.

That being said, you are definitely in the majority, it will be nonstop complaining in the cockpit about it for years I'm sure.