Whatmeworry - I think your argument about the cost of calories seems to be forgetting that the vast majority of people in this country eat more calories than are required on a daily basis anyway, hence the obesity crisis we keep hearing about on the news
My point was that BF isn't free, whether you shovel the calories into yourself or directly into the baby you still have to pay for them. Shovelling too much crap into yourself is a separate issue, obese people don't get a "baby bonus".
Just pointing out that in areas of higher FF, you see higher incidences of chronic illness already, it's happening now. That is why the government wants people to breastfeed. (Although goes about it in perhaps the wrong way)
The reason those people have higher incidences of chronic illness has nothing to do with them FF their babies, and everything to do with existing poor nutritional and health behaviour...which they will inflict on their kids...who will be more sickly etc etc.
Which is why nearly all FF/BF studies are conflicted/conflated, because BF is a mainly MC pursuit and mainly takes place in naice MC areas with better access to health services, better education, and wealthier mummies who can stay at home and BF after statutory maternity ends leave etc etc.
BF won't help them very much, but it will remove most of the supposed advantages of BF from the statistics.