The Peter’s Pence collection totaled €378 million in 2013 per Emilio Fittipaldi’s book, "Avarice: Documents Revealing Wealth, Scandals and Secrets of Francis' Church." The Vatican Bank’s annual profits are also “offered the Holy Father in support of his apostolic and charitable ministry.” This was €50 million in 2013.  As confirmed by Archbishop Becciu, Pope Francis makes only 20 percent of that available for the poor as disclosed by Gianluigi Nuzzi, in his book "Merchants in the Temple." Both authors were indicted and tried at the pope's orders for disclosing Vatican secrets in the only trial held during this pontificate. 
Sandro Mariotti is the pope's valet and he has two private secretaries, as should any man in his position. 
I think he can afford to buy his own shoes.