To be fair I have backpacked around the world and lived on 10$ a day on food and I could have lived on $5 if I didn't indulge. I even have maintained a high lev

To be fair I have backpacked around the world and lived on 10$ a day on food and I could have lived on $5 if I didn't indulge. I even have maintained a high level of fitness and good muscle mass this way, so I was consuming well above survival rate of nutrition. Additionally, I was travelling most of the time in developed countries, and not selecting cheapest options. And certainly was buying small amounts at retail prices. So say 2$ a day as an aggressive estimate of what can keep an average person alive. @ 2$ per person you can feed the world for 5 trillion a year. That's not even 7% of global GDP, and it's not even including home production. So with 7% of global production we can feed every single person--as an upper level estimate. I would bet it's possible to get below 50c per person. That's not a cheap price?