'consequence has its tax'

"Therefore, Sir Walter, what I would take leave to suggest is, that if in consequence of any rumours getting abroad of your intention—which must be contemplated as a possible thing, because we know how difficult it is to keep the actions and designs of one part of the world from the notice and curiosity of the other,—consequence has its tax—I, John Shepherd, might conceal any family-matters that I chose, for nobody would think it worth their while to observe me, but Sir Walter Elliot has eyes upon him which it may be very difficult to elude—"

—Jane Austen, Persuasion (1817)