Why it is not sensible to levy user charges on public goods?

Levying user charges on public goods is not sensible because these goods are non-excludable and non-rivalrous, meaning that once they are provided, they are available to everyone without diminishing their availability to others. Imposing charges can lead to under-consumption, as individuals may opt out of using the service due to cost, which undermines the public good's purpose. Additionally, it can create inequalities, as those with lower incomes may be unable to access essential services, further exacerbating social disparities. Instead, public goods are typically funded through taxation to ensure equitable access for all.