1. Flat rate of taxation for everyone - fair because everyone pays the same percentage, compliance is easy on the customer and less costly to administer.
OR
2. Lump sum rate of taxation for everyone - we are all equal citizens, so why not have everyone pay exactly the same amount of tax every year. The ultimate fair tax.
OR
3. Abolish income tax and increase the rate of VAT. Fair tax, because everyone pays in proportion to the disposable income they spend.
OR
4. Refundable tax credit system to replace both taxation and welfare. Everyone is entitled to a certain minimum income. If the earn less, they get a fully refundable tax credit for the difference (this is actual cash paid to them for those not familiar with RTCs). If they earn more, they pay a flat rate percentage on all income above this limit.