24th Amendment

The right of citizens of the united states to vote in any primary or other election for president or vice president, for electors for president or vice president, or for senator or representative in congress, shall not be denied or abridged by the united states or any state by reason of failure to pay any poll tax or other tax.

Here is a skit about the outlawing of poll taxes.

People in London clearly don't want to pay a poll tax.