Why Some Good People Have So Little

Imām Ibn Taimiyyah, may Allāh have mercy on him, said:

A righteous, pious person is not denied having what he needs of [wealth and] provisions; he’s only protected from unnecessary excesses of this world out of mercy to him and out of being good to him—indeed, an enlargement of [wealth and] provisions can be a harm to the one that happens to, [while] tightness and restriction in [them] can be a mercy to [him].

Majmūʿ Al-Fatāwá, vol. 16, p. 53.