[R] Way OT: Anyone know where to get data on relationship between education and salary

[Paul]

I'm sorry for the way OT post, but here goes.  I'm an informatics 
specialist, and R user.  My wife is a secondary school maths teacher.

My wife recently tried to explain to her class the link between 
education and potential salary, and I would love to be able to show this 
graphically, however, I cannot find any freely available data for this.  
Does anyone know of a suitable dataset, or where I might find one 
?Ideally salary, maximum education level, age, sex, industry and some 
form of geographic location would be amazing.  Alternatively, are you 
aware of any public organisations that would have this information and 
might divulge it under the freedom of information act ?

Thanks in advance

Paul.