The tomes should give so much pp they are worth doing, but they shouldnt give so much pp, that they are the only thing worth doing. But as they would supplement any farming your doing anyway, they could never completely replace farming, i guess.
For sure this would have influance in the economy, but it would give thosepeople out of need for exp, new goals, other than just mindlessly killing the same mobs for pp, or ruin the quest game (make it more competetive) by farming those 65 mobs that drops dropable gear.
But its not like people wouldnt need pp anymore, cause everyone (perhaps except Felyn) have some alt that needs that 1.2m charm. And pretty much everyone has a main that needs it.
(100aa = 100k pp) = (1aa = 1k), to much?
If the current tomes are 1000aa's to max, then doing the exp it takes to max these, would in pp tomes give 1000k pp in the 1aa to 1k pp ratio.
This would for sure make the 1.2m charm alot more available, but it would still take alot of work.
But dont think of tomes as the only source of pp, if you do 1000aa's and get 1000pp for charm, you would prolly get atleast 100k from the exp grouping too (prolly more like 200k+).