This is based on misinformation of course, ‘no tax’ in this case means ‘no income tax’. People who are not eligible to pay income tax still pay national insurance, VAT, fuel duty, tobacco and alcohol duties, car tax, insurance tax, and these taxes often represent a significant proportion of their income.
What those suggesting “No representation without taxation” are really saying is “You don’t count.”
Tax is far too important to merely avoid. Time to think differently about it, before it’s too late.