Politely request a salary review when you discover that your pay is less than colleagues in similar positions.
Dear [Manager Name],
Before I delve in to the core purpose of my letter, I would like to express my full confidence in the benefits system followed at this esteemed company. I have absolutely no doubt in the company's desire to establish a fair environment for all staff by adequately compensating them. This is just one of the many reasons I take pride in being part of this wonderful group and the reason I am able to write such letter.
I don't like to compare myself with my peers as each person has their own strengths, weaknesses and overall contribution. Having said so, I can't help but notice that my pay is still less than some of the people who are doing the same job and same duties as I do. I do understand that factors like experience, education and years with company have their say, but I believe the company actually pays for contribution and productivity of their individuals at the end of the day.
I would like to kindly ask you to consider a salary review taking into consideration the merit of having a fair and unbiased workplace. I am a hard working person and willing to give as much as needed to prosper in this respected organization and wish for my dedication to be acknowledged.
Thank you.
Sincerely,
[Your name]
[Date]