Nursery nurses, teaching assistants, care assistants, post office staff, nearly everyone in retail, catering staff, waiters, factory and manufacturing, office admin, painters and decorators, cleaning, office managers, personal assistants, carpenters, bricklayers, hotel staff, receptionists, medical secretaries, legal secretaries, delivery drivers, everyone on an apprenticeship, artists, small business owners, hairdressers etc etc. So nearly everyone.
You count that as nearly everyone??
What about: teachers, police officers, doctors, plumbers, electricians, accountants, lawyers, engineers, scientists, physiotherapists, psychiatrists, medium and large business owners, plus many, many more. They are all going to be on more than 18K (full time).