It seems to me that there are a few people here who never listened to new wave music unless the song in question was a huge Billboard hit. That’s the only explanation I can offer. “Save It For Later” and “Mad World” are pretty famous songs.
"Save It For Later" I can kind of see. I remember it, but you like said, it wasn't a big hit.
For me, "Mad World" is a different story. Sure, it was before
Songs from a Big Chair, so maybe you missed it, considering it didn't chart in the US. However, the
Michael Andrews/Gary Jules cover version was MUCH more popular, mostly on the back of being in Donnie Darko. Obviously it's been covered a few more times since then.