We are actually on the same page but if it's was a private company - they will not rush to go to Turkana. Do you know nearly 2/3 of kenya have patch cellular network - and gov has to step in to finance them - coz it doesn't make business sense for safaricom.
Public sector therefore cannot be looked from narrow prisms of profit.
Otherwise I repeat Nairobi would be where we throw most of our money. We would get more returns - than building a road in Baringo where car ownership is less than donkey ownership - but we know Baringo need roads for police to deal with say cattle rustlers -
In short - when it come to public sector - we cannot think like private sector - we have to think like NGO or UN throwing billion of dollars annually in Turkana with nothing to show. Or Bill gates massively throwing his money away to worthy social causes.
So anybody who come with long theories about maximum returns in public sector projects is crazy. Roads, Railways and name them are not suppose to bring any returns.
What made those hinterlands undesirable for private sector was sessional paper 10 which stressed investment in high potential areas - i.e Central province and Nairobi. It led to No infrastructure, migration of skilled workforce to favored areas, lack government services and facilities - you had to come to Nairobi for every little document meant those areas stayed back waters. Mandera county only had its first ever tarmacked road I believe in 2014 thanks to devolution. Nairobi in a few years will be deserted as counties' build up and they repatriate more money from the center.
It doesn't make sense to throw money at Nairobi because it is saturated, why not build 10 more Nairobi's around the country. Imagine the economic growth if we have booming regions all around the country instead of over investing in the center. It can be done, you are stuck in Nyayo era.
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Public sector therefore cannot be looked from narrow prisms of profit."
That is you favorite strawman. Public projects have to be financially viable in the long run otherwise they can bankrupt the whole country. Government financing is not limited to the construction face remember, government can not indefinitely subsidize a loss making operation after it is built. You haven't grasped there hard limits to public borrowing. There are fiscal penalties for profligacy. America has a huge infrastructure deficit, old infrastructure is crumbling but they in no rush because it is expensive, lots of handwringing. Big government Keynesians advocate for stimuluses and bonds but cooler heads call for prudence.
I would argue Baringo is the better choice to invest money in than Nairobi. The returns would be greater, more bang for the buck. We are an agrarian nation, our real wealth lies in the rural areas, Nairobi doesn't produce true wealth.