You are all missing the point here, either deliberately or obliviously, it's true and obvious both countries have their own share of poor people. We have Kenyans beggars on the streets of Nairobi, I see them everyday, it's a normal thing to see beggars even in USA.
We even have Kenyans and Tanzanians criss-crossing the borders to go and work on some not so professional jobs.
But the situation addressed in this thread is a bit unique, we are talking about Tanzanians travelling in their hundreds to come and beg on the Kenyans streets. I mean, read the story below, a freaking number of 100 Tanzanians beggars arrested from the streets of Mombasa, just a mere one town in Kenya
Kenya busts human trafficking syndicate - Xinhua | English.news.cn