It's a more complex argument and model than that - you are presumably just as capable of doing your job for the next 2-3 years as you are now; you may even get better. That is not the case for Kalas, or any other footballer. Also, you are presumably paid a decent market rate for your work - again, Kalas is out of phase with current salaries. Kalas' profession is time-constrained, and his value diminishes over time. He depreciates, effectively.
I love economics.