No way the slum city can sink further than this. It can only go up.
We don't expect magic or 'fixing' of the slum city- just some 'disorganized efficiency' and basics such as paying salaries, being on top of contractors, garbage collection, sewers, hawkers control . Being a city that has organically grown through disorganisation for a century plus, it will never be Geneva but it can be managed better for those who have chosen it.
Things like matatus and jams are going nowhere but the slum dogs can manage it better.