In addition to the raw population numbers this is an additional problem. Not much money was invested into the palestinian infrastructure in the past decades. However, a lot is happening lately because of large donations and projects from around the world. This is at least what I have noticed while visiting there the past few years.

Even in the case of Germany after the fall of the wall things didn't turn out that good. To support eastern germany to keep up to the west, Germany introduced the "solidarity tax". A percentage of west german's income goes to the support of east german infrastructure.

It did help rebuild the east but for many west germans it didn't seem right, especially not in the past 5-10 years. Even though the standard of living went up, some things are still not fine. There is still the differentiation between an "ossi" (eastern german) and the "wessi" and the majority of right-winged and racist movements originate from the deep east...

I wonder what the best solution would be, maybe we can learn from past mistakes in similar constellations.