He did it to screw up western Germany, they still recovering from reuniting:)
Interesing teaser.
I remember the whining from W-Germany from the burden of 14 million people wanting to UPGRADE to the western standard as soon as possible.
IMHO that called for an economical growth, since you basically have an add-on of both area, population (with the same language) and a will to progress.
This was something that Germany was ready to go for war for, so many years back.
This time it was on the house...
"Here ya go, we have a fine population of 14 million, housed in about the same density as W-Germany. Accommodation is so-so, ahemm. Equipment mainly Trabants. The people are generally healthy. The land is good, lots of industrial areals as well as good rural lands. Saxony is in the pool, lot's of the Elbe, and nice lands all the way down to Bavaria. Gut? Ja???"
Nice chunk without a war I'd say