The only trouble with that is it would make the hard difficulty impossible (I think). I think something in this vein is probably the right way to go to make the game more fun on replay, but I think it would need more substantial changes
We're doing both for the post-jam version! One of the things we didn't have time to implement for the jam was an additional pick-up resource layer, where you can boost your economy shortly with found loot, which should help with the rising difficulty level (and promote expansion in other directions). We'll keep the page updated :)