> I've recently had a talk with a coworker who worked for a month in USA and one of the things that impressed her most was how much food is thrown into the trash in USA, food prices rise everywhere around the world.

> For me the most obvious explanation is export of inflation from USA:

No, its just the wealth of the USA and how much the US throws into the trash. The US literally bids up world food prices and both eats a lot and also destroys a lot.

> With every start of their money printer the whole world becomes more poor.

That...makes no sense. There are some countries domestically using the dollar, but for most of the world that would just drive down the dollar against the local currency; even if inflation made people poorer in general in the system using the currency (it doesn't, except people with assets fixed in the currency), it wouldn't make people using other currencies poorer.