Who gave parliament the power of the purse?

The power of the purse, which allows Parliament to control government spending and taxation, was established through historical developments in the British political system. This authority was solidified during the English Civil War and the Glorious Revolution in the 17th century when Parliament asserted its financial control over the monarchy. Key figures such as Oliver Cromwell and later, the Parliamentarians, played significant roles in diminishing royal authority and expanding parliamentary power. Ultimately, the principle that Parliament must approve government expenditures became a cornerstone of constitutional governance.