It is good to refer to such websites for reference purposes; however, it's not a good idea to adopt them in totality. In case a company would like to redesign the compensation structure, the best practice is to hire an agency to conduct an exclusive survey for the organization. Kindly note that the information provided on websites like PayScale - Salary Comparison, Salary Survey, Search Wages or SalaryExpert - Salary Survey, Compensation Data, Salaries, and Career Planning are country-specific and influenced by best practices applicable in the US market.
I hope this will help.
Regards.