The solution is simpler than that which is to remove high-denomination notes from circulation and provide all citizens with free bank accounts. Eventually, just

The solution is simpler than that which is to remove high-denomination notes from circulation and provide all citizens with free bank accounts. Eventually, just move to cashless transactions entirely. The bigger problem in countries like Greece though is that the tax burden is immense, for example the sales tax rate is 24%. This creates a huge incentive to avoid the tax. This windfall is then either wasted on corruption or spent on healthcare and pensions for the elderly - ie. not services that the taxpayer can immediately or personally access. Sales tax, company tax, and flat income tax rates around 10%, with no payroll taxes, seem like a better and more sustainable way to go. Flat taxes in Eastern Europe have actually seen tax payments and compliance go up, even with lower and non-progressive rates.