Have posted this before on MN so apologies if anyone has deja vu after reading - re. why VAT hits lower-income households disproportionately.
VAT is payable on fuel for starters (contributing to fuel poverty, a mjor problem for low-income households); adult clothing (bear in mind that most teenagers wear adult-size clothing); all appliances and white goods (why shouldn't low earners have televisions, fridges and ovens?); all sweets, savoury snacks, ice cream and lots of drinks (including fruit juices and smoothies); tampons, sanitary towels and postnatal items; car seats; alcohol, tobacco and petrol.
You could argue, of course, that some of these things aren't essential - but why should people on low incomes be reduced to living only on what is absolutely essential? That's one definition of relative poverty.
I wouldn't have a problem with VAT if it were charged only on genuine luxuries. But a cursory glance at the above list shows that it's charged on plenty of essentials (clothes, tampons, fridges, car seats) and lots of things that are necessary to a reasonable standard of living.