They do demand more. My parents house has 3 trees. The price per tree has increased. Its difficult to get people and if we get someone they usually agree to their price. This in city though not village. Its still a dangerous job. One of the guys who used to come to our house broke his ribs falling from tree.
Palm thorns are letal. I don't have any problem with macaques being trained to do such dangerous job instead having humans doing it. They are much more fit for the job and have the right tools. I couldn't care less about what Petaheads, trying to collect money with sad histories, think about that.
On the other hand, to say that caste system in India is an European thing, is the same as claiming that British introduced Hinduism in India. This is a very naive point of view IMAO.