We don't have a world government
But we have people all too willing to serve foreign interests, specially after meetings with representatives of their government. That's enough.
First, were assuming something is going to be "insanely expensive", which doesn't exactly make sense when talking about food.
It involves applied science. In many countries, scientific investigations are being dismantled as we speak. So they would depend on foreign patents to be able to reproduce the process.
If you invent a product that has that high of a production cost, no one is going to buy it.
Unless you need it to survive. Many countries pay huge patent costs for medication their populations need.