Tax evasion and the shadow economy have created particular
problems. By international standards the difference between takehome
pay and labour costs for the employers is large and the high
tax burden has contributed to shadow economy activities.
Although the extent of those activities is difficult to assess their
share in GNP was probably only 1 to 2 per cent in the early 1960s
but might have reached more than 10 per cent in the early 1980s.