Lets 'em run into debt and blackmails 'em.
"King--of the Khyber Rifles"
Talbot Mundy
The truth at the back of this conception is the feeling that there is a higher power upon which man is dependent; and the error is in supposing that this power is limited by an individuality which can be enriched by selling its good offices, or which blackmails you by threats.
"The Creative Process in the Individual"
Thomas Troward
And surely it is equally obvious that the faded finery, the profligate habits, and the shrill irritation of Mr Glass are the unmistakable marks of the kind of man who blackmails him.
"The Wisdom of Father Brown"
G. K. Chesterton