No one's begrudging anyone food, shelter and other necessities. And everyone should have some comforts, too. I'm happy to know what the Franciscan's are doing but many other religious orders keep investment portfolios and properties far exceeding whatever is needed to care for their elderly. 
But you missed the point i.e. the man who chose the name "Francis" is not doing this nor has he committed his Vatican to it. In fact, just the opposite because his first "reform" of the curia was establishing a Secretariat for (his) Economy to maintain and prosper his wealth.  And so bishops and religious superiors can follow suit.