The gram of paper is still mostly paper. Sure it could have varying amounts of actual acid on it, but still mostly paper.
it would be like if the ml in alcohol were measured along with the glass bottle it comes in - and something with low alcohol volume (say beer) would get you just as much time as a 100 proof whiskey or moonshine.
So when the law is trying to decide how much of a threat the contraband is to society the potential damage of a sheet of acid us much much greater than a hit or a couple of hits(smaller pieces of paper.)
What are you proposing that the acid be recovered from the paper? What would that do? There's no threshold below which you are permitted to posses lysergic acid in the United States.
Legislate penalty by doses if you want, but the fact remains that someone with ten mg of crystal is carrying with them just as many doses as someone carrying a few g of blotters.
Yes, doses are in the order of 100-150 micrograms, for a basic dose. 100ug will do as an approximation.
How many doses of 100ug are there in 1g? Oooh... About 10,000.
So yes, 1g of crystal is a substantial amount, that's the point. Compared to a handful of doses on a gram of paper, it makes a mockery of the law if I were to be charged the same way whichever of the two I was carrying.
(Of course the law is an ass anyway, where it comes to drugs)