Plastic is the way to go
The initiative adopted by the Finance Ministry to compel certain professionals to accept credit and debit card payments is an excellent step in the right direction as broadening the use of plastic money is the most effective way of tackling the serious issue of tax evasion.
The overwhelming majority of Greeks use credit and debit cards so this measure should not inconvenience anyone save a few people who still use cash only or citizens who are not acquainted with modern payment methods.
There are, of course, some special exceptions that should be made but these need to be well founded and not just used as excuses to continue the party of large-scale tax evasion.