This is different from the general efficiency. This means you can use less wire for your job. Now, we don't know if admins are going to enforce you using more wire if you've got a lower rank, but wire is cheap anyways so... Save a buck with this?
A: You use as much wire as you need but no more. You're free to do whatever.
B: You use more wire than you need. Tell an admin or just trash wire on the honor system.
C: Wire crumbles in your hand. You can put it in a wall without breaking down in tears and eating it instead. You can't make anything because if you even tried, you'd be a wire wasting machine. N/A