The interest of money is proportionably so.
货币利息是成。
The state not knowing how to tax, directly and proportionably, the revenue of its subjects, endeavours to tax it indirectly by taxing their expense, which, it is supposed, will, in most cases, be nearly in proportion to their revenue.
家不知道如何直接和对其臣民收入征税,试图通过对他们支出征税来间接征税,据推测,在大数情况下,支出几乎与他们收入成正。