If all of you are working in the same department, that practice will surely make some people unhappy. Why not discuss with management about such seemingly anomaly? From what I know, the manager in the production department can get much higher salary than the one in the admin department although the production manager many report to the admin manager.
KL Siew has put up a sister site by the name of mylabourlaw.net, which is in effect a more user-friendly version of the present popular pesaraonline.net. The site is in the process of being fine-tuned but it is fully functional. You are invited to visit the website at http://www.mylabourlaw.net and give your views or suggestions. Queries can be posted and be responded from there as usual.