Slugs in the compost

Looked around online to see if we should be doing something about it. Apparently, it's nothing to worry about. In all the years we've had compost piles I guess we've never had slugs because I have never wondered about this before...
I seems like we've always had a population of alligator lizards living around there - maybe they kept the slug population down? Where have they gone?
Apparently they have gone underground. (It's under the heading "places and spaces" - scroll down a bit)