It will easily be seen that it would be impossible to complete this Atlantic and Pacific Railway, without at the same time giving great encouragement to the emigration of labour; and this "is only practicable when its cost is defrayed _or at least advanced by others_, than the labourers themselves. Who then is to advance it? Naturally it may be said, the capitalists of the colony, who require the labour, and who intend to profit by it. But to this there is the obstacle, that a capitalist, after going to the expense of carrying out labourers, has no security that he shall be the person to derive any benefit from them." To those who would object to Government interference in a case like the present, we can only say, in the words of Mr. Mill, that "the question of Government intervention in the work of colonization involves the future and permanent interests of civilization itself, and far outstretches the comparatively narrow limits of purely economical considerations; but, even with a view to these considerations alone, the removal of population from the overcrowded to the unoccupied parts of the earth's surface, is one of those works of eminent social usefulness which most require, and which at the same time will best repay, the intervention of Government." "No individual or body of individuals _could_ reimburse themselves for these expenses." Government, on the contrary, _could_ take from the increasing wealth _caused by the construction of this Railway and consequent great emigration, the fraction which would suffice to repay with interest the money advanced_. These remarks apply equally to the governments of the North American provinces as to those of the Hudson's Bay Company and Great Britain.[see Note 57]