Page:Principles of Political Economy Vol 2.djvu/623

Rh an emigration not solely of small farmers, but of the poorest class of agricultural labourers, and which is at once voluntary and self-supporting, the succession of emigrants being kept up by funds contributed from the earnings of their relatives and connexions who had gone before. To this has been added a large amount of voluntary emigration to the seats of the gold discoveries, which has partly supplied the wants of our most distant colonies, where, both for local and national interests, it was most of all required. But the stream of both these emigrations has already considerably slackened, and though that from Ireland has since partially revived, it is not certain that the aid of government in a systematic form, and on the self-supporting principle, will not again become necessary to keep the communication open between the hands needing work in England, and the work which needs hands elsewhere.

§ 15.The same principle which points out colonization, and the relief of the indigent, as cases to which the principal objection to government interference does not apply, extends also to a variety of cases, in which important public services are to be performed, while yet there is no individual specially interested in performing them, nor would any adequate remuneration naturally or spontaneously attend their performance. Take for instance a voyage of geographical or scientific exploration. The information sought may be of great public value, yet no individual would derive any benefit from it which would repay the expense of fitting out the expedition; and there is no mode of intercepting the benefit on its way to those who profit by it, in order to levy a toll for the remuneration of its authors. Such voyages are, or might be, undertaken by private subscription; but this is a rare and precarious resource. Instances are more frequent in which the expense has been borne by public companies or philanthropic associations; but in general such enterprises have been conducted at the expense of government, which is thus enabled to entrust them to the persons