It's not really the *weak* economy, but the hilariously unstable economy that is the problem.
Static empire, worlds with nothing being built, no piracy growth, no new edicts or policies, and you'll just have *massive* resource production swings for no obvious reasons. Size ~200 empire going from +50 to -20 energy/mineral/food per month suddenly for half a year, then up to +10, then down to 0, all in the course of a year, with no input... The economy is *impossible* to plan for.
"I'm at +35 minerals, I can easily fit another alloy fab here" is just not a thought you ever think, because that +35 can turn into -15 with no obvious reason.
Static empire, worlds with nothing being built, no piracy growth, no new edicts or policies, and you'll just have *massive* resource production swings for no obvious reasons. Size ~200 empire going from +50 to -20 energy/mineral/food per month suddenly for half a year, then up to +10, then down to 0, all in the course of a year, with no input... The economy is *impossible* to plan for.
"I'm at +35 minerals, I can easily fit another alloy fab here" is just not a thought you ever think, because that +35 can turn into -15 with no obvious reason.