Who said we will just throw away the money. We will build metro line in Nairobi - needs about 1-2B dollars. We will also build mega dams to provide water to everyone and sewage services to all towns (We probably need 50 mega dams to serve all residents....and each probably cost anything upto 0.5B dollars). We will also build expressways connecting Malaba to Mombasa & Namanga to Isiolo- Maybe Busia to Mau Sumit--definitely build a roads in Northern Kenya- that may required maybe 5B dollars. We will also build coal plants and nuclear plants to provide cheap energy if need be. We will build connect all the 47 counties with freeways. We will spend the 20B dollars need to open up the north via LAPSSET. So you see we badly need that 100B now....and there is so much money in the international markets...we just need to ask!
In short - we need to spend say 25B dollars on our road & bridges - to move from shamefully 15-20% of paved roads to 90%
In short - we need to spend say 25B dollars on our rails (metro, light, mono rail) - to move from shamefully 3,000kms of rails to say 30,000kms - including light rails in major towns.
In short - we need to spend say 25B dollars on WATSAN (dams & supply)- so everyone in kenya can have clean piped water and all the shiet can be hygienical stored & treated.
In short - We have moved electricity coverage to respectfully 75% ( I think it's lower than that - we will see in Census) - but we need to invest billions dollars in cheaper and reliable sources.
In short - We need to spend on public facilities - schools,hospitals, - etc.
After we have done that - we can now resort to trying to grow the economy - by improving productivity, efficiency, social spending, interest rates manipulation, - your kind of thing - fiscal and monetary policies - bla bla - software issues.
But BASIC INFRASTRUCTURE FIRST. We need to nail the hardware.
Eisenhower freeway system connected all the states in continental USA this surely accelerated connectivity and trade. However even before the freeway system individual states
were producing goods and services that the freeway system enabled easier and efficient movement. Spending in economics is like a ledger, an entry on one side affect entry on the other side. Its not a zero sum game. Spending should be commensurate with the economic activity. Also the infrastructure should make ease or be cheaper movement of goods and services. Robina is right, we need investment in infrastructure like metro train, by passes in all major towns, basic things like sewerage system etc.