Taxes that enterprisers are unable to shift to others are reckoned by them as a part of their costs of production whenever the conditions of competition and of substitution make it possible to do so. Every new tax that curtails the supply of any necessary agent must raise the price of the products and cause more or less of the tax to fall upon the consumers. In the Civil War an increase in the tax on whisky increased its selling price, and distillers who owned stocks on which a smaller tax had already been paid reaped profits of millions of dollars. When the tax on tea was increased in England, all dealers that had accumulated a stock before the law went into effect were gainers. Every change in taxation inevitably affects, either favorably or unfavorably, many interests. The chance to anticipate a change in tax laws or to get, from those in power, information of a proposed change, makes speculation possible and political corruption profitable. The fact that a change in taxation is a disturbing element in price is not to be deemed insignificant merely because "all comes out right in the end." Every change in taxation is an element of uncertainty in business and increases the fortunes of some men at the expense of others. Hence no considerable change should be made without good reasons in its favor. The older taxes have the virtue of stability, but in many cases they have grown out of harmony with the industrial conditions. While, therefore, from time to time there is a real need of a reform in the tax system, it should not be undertaken without recognizing the many and complex interests involved. [Footnote 1: Meaning here not a certain political party, but a principle of social action.] [Footnote 2: The total debts of the _national_ governments of the world just before the outbreak of the great war in 1914 were estimated at about $44,000,000,000. (These figures include the debts of the separate states in the federal unions of Australia and the German Empire, and the separate debts of European colonial governments, but not those of the states of the United States, and in no case including the debts of minor divisions, the total figures for which are not to be had.) The new debts created by the war give already more than double the foregoing total.] [Footnote 3: The special assessment is thus in its nature, in part a private investment. The plan, of special assessments could easily be applied in many more cases than is done at present.] [Footnote 4: There are border-line cases where it is difficult to decide whether a particular payment to the government in the form of a fee, price for service (as water rates, etc.), and special assessment (as for street paving) is in the legal sense a tax or not. Some courts have, for example, decided that for certain purposes a special assessment is to be called a tax, and in certain other cases it is not to be if this would defeat the evident and just intention of the legislature.]