Food is perishable. The population rises exponentially. I don't personally believe anyone is purposely destroying food for political reasons that I'm aware of. A great deal is shipped to 3rd world countries in an attempt to help feed their populations where possible. And, even here at home many grocery stores attempt to redistribute food that is about to expire to homeless and poor communities. More can be and should be done. I don't mean to come off as confrontational. If you have some articles that point to this I'd like to read them. That is clearly wrong and shouldn't be happening if it is.

Edit: I'd like to point out though, it seems odd that you are arguing for limiting/destroying production by turning farmland into parks. But then go on to suggest that OECD countries are attempting to limit production unfairly? Very confusing.

Edit 2: My dad was also part of a charitable group that helped provide seeds and training to other countries in need in an attempt to help them to establish their own self-sustaining agricultural industry.