Associate director in GroupM with 9 years of experience, what should be the pay?

Can anyone tell why digital marketing and advertising agencies like GroupM and WPP pay so little to their employees. I mean Digital Marketing and Advertising professionals with 5+ years of experience in Brand Management - Client Servicin...

Comment below for lesser or more experienced folks as well

Exp- 6-7 yrs Domain knowledge- 8/10 Working on Agency side not on brand side.

P.s- Kindly consider top media houses/ performance marketing agencies in india

Up for a promotion to director of analytics, what should be the expected compensation? 10 yoe total, all in analytics.