Tip over the local applecart and expect to get pinched.
What these folks are doing is no less than trying to change a system that has been embedded in / is the local society for many generations.
When you try to change the local power system, expect to get hurt. Badly.
Which is exactly what they're doing. The bottom castes are forced to do all the grunt work. The upper castes won't like it if the bottom castes opt out of the system and tell the Brahmins to shovel their own damn s**t