Things like this could also support very different countries with very different current problems and needs in the same system. Most of the current countries would already start out with quite high development. But if we got, say, Sierra Leone, development would be quite low.
There should also be policies that, in principle, you could do in either country, but some would not make sense for more developed ones (the problems they try to address are already part of development) while others are simply too expensive to implement in developing ones.
This could also mean that, eventually, it’d make sense to actually phase out policies. Stuff you added to, effectively, speed up development, but once it did its job, its effects barely even matter to the current situation and you can save money with very little consequence by getting rid of it again.
(This would perhaps be accomplished by simply scaling its effects inversely with development.)
I already made an earlier thread for accumulators so yeah, I’m fully on board with this idea!