I'm from the U.S., and I was actually raised with a somewhat similar view of food waste. But my parents were born in the 30s. Many of my contemporaries had parents born in the 40s or 50s, and their attitudes were very different.

I was over at a friend's house a few years ago, and she had prepared lunch for her daughter. When her daughter complained she didn't like it, my friend threw the whole plate food in the trash without blinking, and made something else. I asked my friend, and she said the food is so cheap it doesn't matter. And you can't just let your child not eat.

My parents certainly didn't grow up poor. Both of my grandfathers made a good living. I don't know what conclusion to draw, but there seems to have been a huge cultural shift towards food in the post war years.