Cbn And Nigerian Currency

Fellow Nigerians (As Abacha usually says),

It is a known fact that our national currency (the Naira) is only in note forms, that is N5, N10, N20, N50, N100, N200, N500 and N1,000.
Why is it that the CBN does not want to re-introduce the Kobo (coins) yet transactions including the nations budget are done in Kobo? Is the Kobo only for the pages of papers? Is it not proper for the CBN to re-introduce the coins and reduce the circulation of higher denominations.
I was told that USA has other denomination above $100 but it is hardly in circulation (i am not very sure of this), hence the cents is still very active.
NLders, what is your take on this issue? Can't this measure reduce corruption?

Common sweets (candys) cannot be purchased with kobo because it does not exist.