US agriculture subsidies are not colossal in fact. They're about $20-$25 billion per year. They shouldn't exist at all ideally, however given the immense size of the US agriculture market, and how critical it is to keeping hundreds of millions of people alive, it's hardly a concerning sum.

By contrast, EU farm subsidies in a smaller economy are three times that size. If the US farm subsidies are colossal, I'm not sure what you'd call 3x colossal.