I've been through the corundium crunch, the duranium crunch, the gallicite crunch, but I'm experiencing a first in my current game... the human being crunch. After 30 years I've expanded my production and research installations so much that the population of Earth can't support them. Only about 700 million people live on Earth with 200-300mm each on Mercury, Luna, Mars, and Io. I have a worker shortage of about 100 million.
I happen to have a conquered alien race with 1.4 billion population a single jump from Earth, and they're not doing much of anything worthwhile. I have lots of colony worlds out there seeded for humans, so now we're rapidly re-purposing them to take alien colonists. The upside is that it's a lot easier to terraform planets for these critters, as they prefer a lower oxygen content and temperature. Meanwhile I'm transporting research labs to colonies near and far, and have moved all my manned mines off-planet, but it's going to take years to rebalance everything so that Earth's industries and shipyards are back up to full efficiency...