loosen the purse strings
To become more liberal with one's expenditures; to increase the availability of money for spending purposes. After having to count my pennies for so long, it's nice to be able to loosen the purse strings a bit! We'd have a much better and more stable product if the boss would loosen the purse strings a little.
loosen the purse strings
or loosen your purse strings
If you loosen the purse strings or loosen your purse strings, you allow more money to be spent. If the Treasury loosens the purse strings, many authorities will be delighted to spend. Companies are loosening their purse strings and making investments in network improvements.