Not sure what your point is, Ross ~ grammatical or satirical. Anyhow, looking for analogies [as in the non-existence of 'bept' for beeped', rubricated above], is as sterile as trying to find logic in English spelling {tough, bough, cough, ...} ~ the whole point being that English doesn't work in that logical fashion, so that 'learned/learnt' provides no necessary precedent for non-existent 'earned/earnt'; tho this perhaps anyhow catching on thru misplaced usage?