There’s an unwritten expectation for the kids to reciprocate.
A lot of Indians (and I am sure it's true for other nationalities) owe a lot to the Tech industry for absolutely transforming their standard of living in the last 1-2 generations. Tech was also remarkably egalitarian since anyone with the inclination could learn it with a relatively modest investment in a computer or even unimpeded access to a computer at school.
I wonder if future generations will see the same lifestyle transformative effect. Or perhaps the new bar is access to an H100 GPU.
A significant section of my grad school class sends around ~$1000/ month back home.
Also, the upper-middle rung of Indian society (top 5 - top 15%) is still pretty poor by western standards.
I would say a good 80% of Indian immigrants I know send money back to their parents every month.