You had the world's leading expert here, Hernando de Soto, answering this question. I can simply repeat a little bit of what he said.
In Kenya right now we're working with an association of the informal sector to try to give them voice. There is a bill in front of the Kenyan sessional Parliament that has been supported by several ministers. We're hoping it will pass this year. I hope the recent arrests don't slow this down and sidetrack everything in Kenya, that in fact the parliamentary session will continue.
To me, changing the structure is the best thing that could be done for the informal sector. Now, that being said, you have to still recognize that even though you may have removed a lot of the barriers, unless you improve government services and unless you give the informal sector an incentive to want to migrate into the formal sector, it won't. If the cost is still higher than the benefit.... You have to remove barriers and make governance work in order to create the incentive for people to say, oh, yes, it's better over here.
There are cases in countries around the world where people have gone from formal sector jobs and opened up companies in the informal sector, because the return on investment was higher there. And a lot of it comes down to doing what you do because of your incentives.