No. Why should they be?
Is the employer going to be loyal to them? No.
The employer is going to use their labor and talent, for the lowest price they can get and then dump them when they become too expensive or the employer discovers a cool new way to outsource. Employees should adopt the same attitude towards their employers. Employee loyalty is neither a useful or good trait in today’s world.
The only way to build up your salary is to job hop. Don’t let anyone tell you it is not a good thing. It’s the only thing. I remember I started a job B and got 15% increase over job A. I got another offer, job C, from another company with 10% more. So in one month I increased my salary 35%.