Farm subsidies play on the greed of the farmer, so that the government can control them. This was brought on by the seed company suppliers lobbiests. For instance, there are certain seed crops that the farmer cannot put back at harvest without permission from that seed company, even though the farmer bought the original seeds to plant the crop in the first place.
The government ENFORCES these laws in payment for campagin donations from lobbiests. To keep the farmers happy, they can sign themselves AND non farming family members up for these millions of dollars of tax payer dollars. It's THE BIGGEST welfare program on the books.
Chech IWG FARM SUBSIDY DATABASE for a real eye opener on this practice.