“According to the court's well-established case law … an interference, including one resulting from a measure to secure the payment of taxes, must strike a 'fair balance' between the demands of the general interest of the community and the requirements of the protection of the individual's fundamental rights. The concern to achieve this balance is reflected in the structure of art 1 as a whole, including the second paragraph: there must therefore be a reasonable relationship of proportionality between the means employed and the aims pursued. Furthermore, in determining whether this requirement has been met, it is recognised that a contracting state, not least when framing and implementing policies in the area of taxation, enjoys a wide margin of appreciation and the court will respect the legislature's assessment in such matters unless it is devoid of reasonable foundation …”