For some reason governments can't help interfering in agricultural markets. And most of the time they make things worse, an example of
government failure.
Thailand are the latest government to distort a food market. They are offering a premium of about 50% to rice farmers to buy up rice in unlimited amounts. The claimed motive for this policy is to raise the income of farmers who are amongst the lowest paid in the country.
But such policies, however well intentioned, distort the market. This effectively raises the price in the local market, (see the diagram above) but will inevitably lead a situation of excess supply in Thailand and a distortion of the international market.
As a major rice exporter changes to the local market will inevitably lead to changes in the international price. Why would a Thai farmer sell on the open market when the government will pay more? So the supply of Thai rice to the international market will fall, forcing up the world price and causing problems for the poor of other nations.
There is also the question of what to do with the rice the government buys. Some schemes stockpile food in years of surplus to release in lean years. Doing so helps moderate price fluctuations and smooth out farm incomes. However the Thai floods mean production is actually down this year so its not the time to start buying up stocks.
The EU pursued a disastrous agricultural policy from the 1950's to the mid 2000's where they paid farmers far to high a price for food. This caused an inefficient over production in Europe and reduced the incomes of farmers in LDC's where the market would produce the food most cheaply and efficiently. The solution for the EU was to move to direct income payments, simply giving money to the farmers and so avoiding the incentive to them to produce ever more unwanted food.
