Yes, but then it needs to be stored, and the price effects might encourage even more production. Previously this has led to events like the devastating Wisconsin butter flood [0] ("A firefighter reported flames 300 feet (91 m) high", "It took about twenty hours to contain the blaze, and eight days until the fire was officially out").
Not that rice would do anything so nefarious, but more to point out that large scale purchase and storage is not a trivial task. I can imagine the scenario where some bureaucrats ran the numbers and concluded that it is cheaper to just give the money to farmers instead of running the purchase/storage scheme.