Of the Persons Upon Whom a Benefit is to Be Conferred
For what must be said of those who, induced by the vanity of popular favour, expend on the exhibition of shows wealth that would be sufficient even for great cities? Must we not say that they are senseless and mad who bestow upon the people that which is both lost to themselves, and which none of those on whom it is bestowed receives? Therefore, as all pleasure is short and perishable, and especially that of the eyes and ears, men either forget and are ungrateful for the expenses incurred by another, or they are even offended if the caprice of the people is not satisfied: so that most foolish men have even acquired evil for themselves by evil; or if they have thus succeeded in pleasing, they gain nothing more than empty favour and the talk of a few days.
Thus every day the estates of most trifling men are expended on superfluous matters. Do they then act more wisely who exhibit to their fellow citizens more useful and lasting gifts? They, for instance, who by the building of public works seek a lasting memory for their name? Not even do they act rightly in burying their property in the earth; because the remembrance of them neither bestows anything upon the dead, nor are their works eternal, inasmuch as they are either thrown down and destroyed by a single earthquake, or are consumed by an accidental fire, or they are over through by some attack of an enemy, or at any rate they decay and fall to pieces by mere length of time.
For there is nothing, as the orator says, made by the work of man's hand which length of time does not weaken and destroy. But this justice of which we speak, and mercy, flourish more every day. They therefore act better who bestow their bounty on their tribesmen and clients, for they bestow something on men, and profit them; but that is not true and just bounty, for there is no conferring of a benefit where there is no necessity. Therefore, whatever is given to those who are not in need, for the sake of popularity, is thrown away; or it is repaid with interest, and thus it will not be the conferring of a benefit.
And although it is pleasing to those to whom it is given, still it is not just, because if it is not done, no evil follows. Therefore the only sure and true office of liberality is to support the needy and unserviceable.
Source: The Divine Institutes (New Advent)