Brother can you spare a penny, or why no I in DME

[Tukhachevskii]

While perusing through the UK Joint Doctrine Publication 01 (UK JDP-01, 2nd Ed.) I noticed that our (UK) government describes the basis of national power as residing in the Diplomatic, Military and Economic spheres and thus DME. As far as I recall US doctrine, OTOH, includes an I for Informational Power and thus; DIME. Is this a mere stylistic ommision (given the existence of UK 15 PSYOPS Group I would have thought Informational power was part and parcel of our warfighting doctrine especially given our past heritage, i.e., PWE)? Or is it something much more fundamental doctrinally speaking and if it is I can't for the life of me figure out why other than to differentiate our doctrine from that of the US (...sort of like the French habit of creating new words for existing English ones to preserve the purity of the French language...ordinator anyone)? Has the (Neu) Labour regime currently in power have something against information operations or political propaganda (perhaps its not up to their ethical standards)? Your learned views would be very much appreciated as per usual.