Loosen The Purse Strings Meaning

Example : 1848, Parliament of Great Britain, “The Parliamentary debates”, volume 96‎, page cdlvii:  He thought the effect of this language from the Prime Minister had been to loosen the purse-strings of the Treasury.2004, The 9/11 Commission report, final report of the National Commission on Terrorist Attacks upon the United States (authorized edition), National Commission on Terrorist Attacks upon the United States, page 358:  Proponents of the counterterrorism agenda might respond by being less inclined to loosen the purse strings than they would have been if offered a convincing...