How about removing income tax (hard to measure, easy to avoid by rich) and increasing vat by the same amount. Vat could be even added to stocks (buying $5000 of Tesla stocks? Pay 20% vat. This could probably end all short term speculations as well). Definitely to yacht and houses, vacations, butlers and gardeners, gold doorknobs, Ferraris, swimming pools, 200" LCDs, hotel stays, massages, anything that is consumption really)