as someone who has three siblings with master and employed...
it's a hit and miss thing. one sibling got high pay while the other got starting pay level diploma even though both got jobs that was related to the course.

one of them even told me that for my course, Masters grad are paid Degree level starting salary because they have no allocation (tangga gaji) for anything above degree. so my course has no use for Masters; it's like getting sijil for Matriculation but din continue degree.

so ask around from your friends in the industry whether they have allocation for master, or they only focus on experience.

better ask around people in shell/petronas whether they have pay level for masters.

p.s. some companies also will let you continue masters during your work there with full pay. if you get these it's a gold mine