Colonial localization is a long-term national policy that might last for a hundred years. The Vienna Government cannot directly incorporate the Austro-African colonies into the homeland; that would spell disaster.
Factors such as governance costs, long-term stability, culture, strategic layout, and others all require consideration.
In terms of cost, the local economy must first develop to a certain level, at least to the point where it no longer needs financial support from the central government.
After all, post-localization administrative costs would increase, and social welfare expenditures, such as healthcare, education, transportation…
All these require money. If the central government collects enough taxes from the local area, then everything is not a problem. "From the people, for the people" is one of the functions of a government.
