Hi! I am not knowledgeable about your labor laws, but let me help out based on certain basic employment terms and references.
Employment Contracts and Payroll Responsibilities
An Employment Contract duly signed by the authorized officers of your company is a binding document that your payroll supervisor and staff must respect, regardless of the "outrage" they may feel about the "high" rate given to the three "new" employees. We assume that the salary rate was negotiated in good faith by the concerned employees.
The feeling of "outrage," anger, or resentment by old employees seeing that newly hired ones are being paid so high is a normal employee reaction. That's why salary matters, especially managerial and executive salaries, are highly confidential and are supposed to be handled not by ordinary payroll employees but by a trusted and mature executive who understands executive compensation.
Handling Executive Compensation
If this is executive compensation, then your problem is negligence on your organization for entrusting such a sensitive issue to ordinary employees.
Addressing Hiring Rates Beyond Salary Structure
If this is not an executive compensation issue but of hiring rates that are beyond the company's salary structure, then the problem is both employee and corporate.
Your payroll supervisor does not have any business meddling with pay decisions. His job is merely to make sure that every employee with the proper employment contract is included in the payroll list and is paid on the normal pay period.
Submitting Complaints and Establishing Policies
If they have a complaint about the extraordinary rate that was given lately to the three (3) employees, then they must submit their complaints to the proper forum, e.g., Grievance System (if unionized) or Compensation & Benefits Committee (if not unionized).
You would do well to have a Compensation Policy that will provide clear guidelines regarding hiring rates and other issues.
My company has a very good HR Policy Manual that includes this policy. If you are interested, you can buy this from us, and I can extend additional assistance in solving this current problem of your company.
Best wishes.
Regards, Ed Llarena, Jr.
Managing Partner
Emilla Consulting
(helps improve corporate governance in Asia and the Pacific Region)