There are many reasons why we must write clearly. The one that is relevant here is that clear writing is a commitment to integrity...
The problem with vague writing is that it lets an author convey a false impression yet retain plausible deniability when someone tries to verify the claim...
My favorite book on editing recommends looking at the “the first seven or eight words in a sentence. If you do not see a character as a subject and a verb as a specific action, you have a candidate for a revision.”
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On Economics and Management
Notes for Bank insiders by Paul Romer
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See also A spat over language erupts at the World Bank