NOTE: My comments are based on before the bailouts.
I've seen reference to Greece having some people retire at 53, but the average retirement age of 57. This was at the same time that the UK and Germany rose their retirement ages to 67. There is no way the Greek government could keep this up without fiddling the books.
Then you have the grey economies where most things were bought and sold illegally without paying taxes on them. Sales tax, VAT and other taxes are extremely important to governments. As an example, income tax in the UK only covers the welfare bill and nothing more. So every other source of tax is desperately needed.
Then there's the civil service who get paid as if they work a 15 to 18 month year, plus other outrageous work related benefits. In the UK, a similar thing was happening with the civil service, but the global economic crash helped fix some of that. Civil servants are still making about 17% more than people doing the same job in the private sector. That's down from 38% to 47% more.
++++
As I said previously, I only really knew about Greece since it was a major news topic here.
23% tax on food is extremely high. In the UK (and the US) most food is tax free or severely reduced taxes. Luxury foods being the obvious exceptions.
Only certain places in the UK, like London have congestion charges. It varies by place, but some places charge everyone except mass transit, taxis and electric cars, while others charge everyone except mass transit. Some places exempt employees of local firms.
Also, car insurance is a weird thing. It can be extremely high depending on where you live, your age and your job.