The European Union takes this matter pretty seriously - hence the whole do not track and cookie notification policies that you see with European websites these days. I live in Canada now, and here they have two federal privacy laws, the Privacy Act and the Personal Information Protection and Electronic Documents Act - though some provinces are deemed federally exempt because they have their own legislation that is substantially similar in nature to the federal mandates. I guess this "right" isn't accounted for in U.S. law?
> Article 8 – Right to respect for private and family life
> 1. Everyone has the right to respect for his private and family life, his home and his correspondence.
> There shall be no interference by a public authority with the exercise of this right except such as is in accordance with the law and is necessary in a democratic society in the interests of national security, public safety or the economic well-being of the country, for the prevention of disorder or crime, for the protection of health or morals, or for the protection of the rights and freedoms of others.
I am not a lawyer, however I think this refers to personal and family matters. How much you're being paid by your employer is not a personal matter, it's a business matter.
There are many public employees whose salaries are published openly and regularly. If this was a breach of human rights, then it is a breach that the UK government is guilty of on a regular basis.
Ref: http://conventions.coe.int/Treaty/en/Treaties/Html/005.htm