You'd think that by following a Savior (and the mass readings lately are all about following) who associated himself so inextricably with the poor that that's where Chrisitians would be. Sadly, I've found this not to be the case. So, I have to say that poverty is a challenge to Christianity, a challenge we've chose largely to ignore.
I ask myself, "How can this be?"
For one, Christianity is so divided right now and with the pressures each faith community experiences in finding and funding a place to worship as well as a pastor to lead them, it's no wonder that they have little resources available to help those in need.
Secondly, I wonder if it's even important to some Christian denominations that they serve those in need. I've run across attitudes of 'the deserving poor' and what not, so maybe, theologically, confronting poverty is not that important to them.
And thirdly, I've found the most prevelant charities in my area have a profit motive. That is, they've figured out how to make a career out of helping people. Sort of a 'do well by doing good' philosophy.
So, yes, poverty is a challenge to Christianity. A challenge which has gone by some, largely ignored.