Most of us receive some communication from the Inland revenue during the year, whether it is a demand, or a statement. The breakdown should be sent out with that and the cost is negligible.
I do not see this as Tory Propaganda, I see it as transparent Government.
APress Release would not be adequate because the Press will misrepresent the figures, such as the Daily Mail headline above. The information is easy to find, but most cannot be bothered and rely on the misleading press to (un)inform us.
As long as it is done right, I think the statement is a good idea.