Also, we must remember that farmers income equals price multiplied by output or yield. Your question relates to only one part of farmers income, but the second aspect is also very important. Moreover, you cannot go on increasing prices. Supporting price system may have to be continued for some more years. But, there are some other fundamental problems with agriculture related to non-price factors.
Cost of production has to be reduced and yields have to be increased.
Public and private investments in infrastructure and agriculture research are important. In rainfed agriculture, watershed development and rainwater conservation are important. Unless you do these things, just raising the agricultural prices is not sustainable. It is difficult to predict now. My guess is that things may not be that bad if you take the law of averages.