As bad as I feel for the OP, you have to take responsibility instead of blaming Google. Seems like they do a good job of explaining when you empty the trash in Drive:

"Files in your trash are about to be permanently deleted, including Google Docs in your Trash. Warning: When using Google Drive for PC/Mac, Google Docs aren’t actual files saved on your hard drive; they are links to files stored online."

If you want a real backup of Google Docs, try Takeout: https://www.google.com/settings/takeout