biggest problem with progression is the lack of technological advancements for food gathering. historically if you look at the past, the ratio of farmers to specialized positions were as much as 5 farmers: 1 job. modern times with the introduction of machinery, accumulative knowledge and genetic alteration, you can have 1 farmer support 20 people.
in this game, you will always need a 1:1 ratio or everyone dies. 2/10 design