United States ex rel. McLean v…
“ To require the postmaster general, who alone can make these readjustments, to act upon every case where the last quarterly return shows a case for a readjustment, would be imposing a duty which it would be impossible for one man to perform, and which in itself would be an inconvenience not justified by any benefit to the incumbents of such offices. This compensation might vacillate every quarter. A salary might be increased one quarter, and it might be proper to diminish it the next ”
