All companies. It's a basic principle derived from the inherent rights to freedom of contract and freedom of association, as well as right to property.

Though the basic three options apply to every situation in life. Given a given situation you dislike you have three, and only three, options. 1) Seek to change it. 2) Failing that, choose to endure it. 3) Failing that, choose to escape it.

As we live in what is still a mostly free society, if you don't like the terms of the job -someone else created and owns- but who is, of their own free will, offering to others, but you do want the job, your options are: (1) try to sell/demonstrate yourself as worth more to the business owner than what they are offering, (2) take what they offer, or (3) look for a different job and/or start your own (and/or improve your skills and qualifications to make yourself more able to do #1). 

No one is -entitled- to a damn thing from any other person other than physical non-aggression and basic courtesy.