I recently watched a documentary about house girls in Nairobi on BBC. Many of them travel from as far as Uganda to work in Kenya. Many are underage girls, and travel alone with no identity cards. They end up in homes where they may get abused, underpaid and unrecognised by law.
With such a high risk of travelling through the border to a world unknown, their prospects are still much better than staying home due to poverty. At least they feel, they can get work and get some pay, enough to send home and provide – the currency in Kenya is stronger so it can do more in Uganda.