Anybody who earns enough money pays tax, there is actually no age limit. If you have a part time job paying more than £12.5k a year you'll pay income tax. If you are paid more than £9k your employer has to start paying National Insurance.
If your definition is people who pay cash tax then we need to stop most pensioners, disabled people, people on benefits, stay at home partners (mostly women), part time workers, carers, and probably others I've missed from voting too then?

Where is the COBRA meeting for this?