I have often been irritated by ex-public school politicians dropping the letter t, presumably not to sound too 'posh' and thus hoping to align with the common citizen and 'hard-working families' (so overused and patronising!).
Blair did it, also Osborne, and now I have heard Rishi Sunak (ex-Winchester) wanting to ge' on with the job and concentrate on what's impor'an'.
I don't think Cameron is guilty of this habit, thus earning my respect, nor does Jacob Rees-Mogg 'dumb down'. People should be true to themselves.