What. The. Fuck.
Just like in real life, gathering is left to the peons! It's definitely a good source of gold, but once you have enough to buy up the materials, it's a lot easier to profit from crafting instead of scavenging. Sounds like garrisons have Shangai'd my crafting factory and even the few gatherers, though.
How? Just blow up garrisons, either removing them or not updating them or the things they can produce? Seems like a pretty big thing to go back on now, but I haven't played, so can't say for sure.