Leaking as a public duty

Of whom is this a description?

“A kind of official urinal in which, side by side, high officials of MI5 and MI6, sea lords, permanent under-secretaries, Lord George-Brown, chiefs of the air staff, nuclear scientists, Lord Wigg and others, stand patiently, leaking in the public interest. One can only admire their resolute attention to these distasteful duties.”

Why, the Daily Express journalist, Chapman Pincher, who, in his recently-published memoirs) describes this description (by E.P. Thompson) as “my most cherished professional compliment”.