When someone strips another of his clothes, he is called a thief. Should not someone who has the power to clothe the naked but does not do so be called the same? The bread in your larder belongs to the hungry. The cloak in your wardrobe belongs to the naked. The shoes you allow to rot belong to the barefoot. The money in your vaults belongs to the destitute. You do injustice to everyone who you could help but do not.

Source: Ownership: Early Christian Teaching