Health benefits question

[Guest question]

If my employer normally only pays $400 towards health benefits per employee and they all receive a memo. However, another employee had an agreement no in writing that the employer will pay full cost of family coverage, does this leave room open for another employee to ask for more money from the company to contribute towards their health benefits.

Is the any regulations that states if you do for one employee that you need to do the same of another employee at the same level?

Please let me know where I can find more informaiton.

Thank you