Point to note: migrant workers from other states are needed to work in the southern farms. The missing farm labour force are invisibly employed elsewhere. I would wager that it is in the tech sector.
I disagree. I took a look at Labour Report by the Government of India, https://labour.gov.in/sites/default/files/Report%20Vol%203%2..., which is based on the 2011 census data. A large portion of India's population is still poorly skilled.
Besides, the tech sector has a higher barrier to entry compared to the blue collar and agricultural sector.
Well, I'll say that Indian state demographics change slower than those of 'developed' countries.
Besides, California is an outlier, even within the States.