I realized my dad is being severely underpaid or is it the reality?

My dad works as a diamond metal setter at an export company in SEEPZ, Andheri East. He has been working at this same company for over 20 years, yet his monthly salary is only around ₹24,000. This is our entire household income.

I strongly believe he is being heavily underpaid for his experience. Because my dad is not literate, he has never tried to switch companies out of fear of losing job security or not finding another role due to his age(M 55). This has left us severely constrained financially. Every single financial decision, from tiny daily expenses to major household needs requires us to think multiple times. We have never been on a vacation, we don't own any fancy things, and we have zero savings. The financial insecurity is constant. To give you context, it took us 20 years just to be able to afford an AC.

As his only child, the responsibility is on me to turn our financial situation around. I am preparing hard to get a good placement this year. However, I want to ask the community, is this really the standard pay rate for a diamond metal setter in Mumbai, or is he being exploited?