Rubber is a bit different to rice, cassava or any seasonal crop.
It's a weekly wage for most of the year, 10 rai or more and even at bad prices they drive new cars.
Most will have a rice crop as well, food covered, no rent or mortgage, so income from the rubber is expendable.
Rubber, family farmers do ok, it's the bigger guys that complain the most, they are employers, low prices cut into profits.