Seems more likely that he's attempting to follow St. Ignatius' advice: "The despising of one's self in the midst of honors and riches, and disdain for all glory, should be esteemed more highly than corporal mortification."
We can't expect a Jesuit who's spent half his life immersing himself in Ignatian spirituality to abandon the results of his spiritual formation in response to being elected Pope.
Catholics know that we like ornate churches, beautiful music, and elaborate vestments for the Pope (and even normal parish priests) and we oppose the Protestant version of bare and simple things.
Now suddenly, everyone seems to have changed. Note I am not saying the new Pope is a closet Protestant or anything like it, but there is true poverty and true humility and false versions too.