No. Banning of raw exports works. Macademia is good example.
Look at this
http://nuts.agricultureauthority.go.ke/index.php/sectors/overview-nutsOn obscure crop like macademia, cashew nuts and coconuts - they are nearly 200 companies.
That is an impressive value chain.
Now imagine Tea - Srilanka produce less than us but earn more than us.
We already dominate the export market - if we agree with Uganda, Rwanda, TZ and Malawi - to jointly ban raw export of tea - where will they get tea? India cannot satisfy internal demand. And Tea is not something you can wake up and grow tomorrow - assuming you have the climate for it.
The same for Ghana and Ivory coast - they get 2-4B dollars - while chocolate industry is worth 100B - and you have little countries like Switzerland profiting.
We need to ban raw exports of our goods. That simple.
We have done the same on hides and skins. Macademia. Next will be tea.
This only way to kick start manufacturing through agro-processing - and our export value.
Right now we are stuck at 6b dollars - and our imports have grown to 20B dollars - and with debt situation - we are playing with fire.
To improve manufacturing and export - we must ban any export of raw materials - and given local companies incentivies through EPZ model - so they can compete international.
Also the Liptons can come to kenya - and be given EPZ license - they can set up in Dongo Kundu Free Port - get as nearly same conditions as they would in Netherlands - but Keep JOBS here - the DOLLARS here - and multiplier effect.
And they should proudly display MADE in KENYA.
Actually sri lanka hasn't banned export of raw tea. Sri lanka export 45% of its tea in value added form the rest raw. Everyone wants to value add and capture as much of value chain as possible. Arbitrarily banning export of commodities doesn't create value addition especially in commodities that the country doesn't have great leverage. Tax policy, innovation and encouraging creation of brands is how to add value. The tea development board should have a marketing department to market kenya brands internationally. Sri Lanka it has taken them more than 20yrs to create a global brand.