Why We Pay To Send Letters
You do not actually pay for a stamp to cover the cost of shipping a letter. Instead, a postage stamp serves as a legal receipt proving you already prepaid a flat fee for the government to move your mail.
Before the mid-19th century, the recipient often paid for postage, which made receiving mail expensive and risky. Sir Rowland Hill changed everything by proposing that the sender prepay a standard fee, making mail affordable for ordinary people. This simple shift transformed the post from a luxury service into a global public monopoly. Today, these adhesive bits of paper act as a symbolic contract between you and the state.
Source: Mail