Would the social benefits summarily described in the foregoing paragraphs be sufficient to justify the increased land taxes in the face of the losses that would be undergone by some landowners in the three ways already specified? In view of our ignorance concerning the probable amount of benefits on the one hand and losses on the other, it is impossible to give a dogmatic answer. However, when we reflect on the manifold social evils that are threatened by a rapid and continuous increase in land values, and the resulting decrease in the proportion of the population that can hope to participate in the ownership of land, we are forced to conclude that some means of checking both tendencies is urgently necessary for the sake of social justice and social peace. The project that we have been considering; namely, the transfer of taxes on improvements and on personal property to land by a process extending over twenty years, seems to involve a sufficiently large amount of advantage and a sufficiently small amount of disadvantage to justify systematic and careful experiment. _A Supertax on Large Holdings_ Every estate containing more than a maximum number of acres, say, ten thousand, whether composed of a single tract or of several tracts, could be compelled to pay a special tax in addition to the ordinary tax levied on land of the same value. The rate of this supertax should increase with the size of the estate above the fixed maximum. Through this device large holdings could be broken up, and divided among many owners and occupiers. For several years it has been successfully applied for this purpose in New Zealand and Australia.[107] Inasmuch as this tax exemplifies the principle of progression, it is in accord with the principles of justice; for relative ability to pay is closely connected with relative sacrifice. Other things being equal, the less the sacrifice involved, the greater is the ability of the individual to pay the tax. Thus, the man with an income of ten thousand dollars a year makes a smaller sacrifice in giving up two per cent. of it than the man whose income is only one thousand dollars; for the latter case the twenty dollars surrendered represent a privation of the necessaries or the elementary comforts of life, while the two hundred dollars taken from the rich man would have been expended for luxuries or converted into capital. While the incomes of both are reduced in the same proportion, their satisfactions are not diminished to the same degree. The wants that are deprived of satisfaction are much less important in the case of the richer than in that of the poorer man. Hence the only way to bring about anything like equality of sacrifice between them is to increase the proportion of income taken from the former. This means that the rate of taxation would be progressive.[108]