Yes Wanjigi was a super dealer - who brought Chinese contractors - and get his 10 percent. However SGR 10 percent was a whopping 50B Kshs - and Uhuru wanted it all. Wanjigi having invested in bringing the chinese and having financed Jubilee could hear none of it. Ruto advised Wanjigi to let go of SGR - Ruto through DL was also targetting it - but when Uhuru took an interest - Ruto was smart to let go.
Uhuru went hard on him - cancelled JKIA and any wanjigi linked Chinese saw dust - and when that did not work - he went and demolished his house to look for guns.
That has dried up Wanjigi swamp - but he trying to bring Raila in so he can go back.
Kenya contracts are almost by default inflated for 10 percent brokerage fee