Of the net profits of persons in business, a part, as before observed, may be considered as interest on capital, and of a perpetual character, and the remaining part as remuneration for the skill and labour of superintendence. The surplus beyond interest depends on the life of the individual, and even on his continuance in business, and is entitled to the full amount of exemption allowed to terminable incomes. It has also, I conceive, a just claim to a further amount of exemption in consideration of its precariousness. An income which some not unusual vicissitude may reduce to nothing,
ducing by three-tenths, or one-third, the assessable amount of industrial incomes." Proposed Report (p. xiv. of the Report and Evidence of the Committee of 1861). In such an estimate there must be a large element of conjecture; but in so far as it can be substantiated, it affords a valid ground for the practical conclusion which Mr. Hubbard founds on it.
Several writers on the subject, including Mr. Mill in his Elements of Political Economy, and Mr. M'Culloch in his work on Taxation, have contended that as much should be deducted as would be sufficient to insure the possessor's life for a sum which would give to his successors for ever an income equal to what he reserves for himself; since this is what the possessor of heritable property can do without saving at all: in other words, that temporary incomes should be converted into perpetual incomes of equal present value, and taxed as such. If the owners of life-incomes actually did save this large proportion of their income, or even a still larger, I would gladly grant them an exemption from taxation on the whole amount, since, if practical means could be found of doing it, I would exempt savings altogether. But I cannot admit that they have a claim to exemption on the general assumption of their being obliged to save this amount. Owners of life-incomes are not bound to forego the enjoyment of them for the sake of leaving to a perpetual line of successors an independent provision equal to their own temporary one; and no one ever dreams of doing so. Least of all is it to be required or expected from those whose incomes are the fruits of personal exertion, that they should leave to their posterity for ever, without any necessity for exertion, the same incomes which they allow to themselves. All they are bound to do, even for their children, is to place them in circumstances in which they will have favourable chances of earning their own living. To give, however, either to children or to others, by bequest, being a legitimate inclination, which these persons cannot indulge without laying by a part of their income, while the owners of heritable property can; this real inequality in cases where the incomes themselves are equal, should be considered, to a reasonable degree, in the adjustment of taxation, so as to require from both, as nearly as practicable, an equal sacrifice.
