It was said on a time interval from a very long time before 1970 until around 1970. This was not a direct reaction to the Great Famine ( which wasn't widely discussed in the US ).
If you're not familiar enough with American culture to know what I mean, then don't worry about it.
When faced with picky eaters, before around 1970, parents all over the USA would use the cliche that "children are starving in China."