hold the purse strings have control of expenditure.
make a silk purse out of a sow's ear: seesilk.
tighten (or loosen) the purse strings restrict (or increase) the amount of money available to be spent.
英语词组固定搭配大全包含15956条英汉双解词组,基本涵盖了全部常用英文词组、短语的翻译及用法,是英语学习的有利工具。