Okay. While there's a lot of tin-foilery going on here, there might be a little truth to it, especially in California...
But more seriously, the most likely culprit in the decline of bare lead ammunition is largely economic. The large ammunition houses can produce jacketed ammunition in such economies of scale that the price of jacketed bullets versus lead bullets is small compared to the premium they can ask for jacketed ammunition. It isn't worth it to produce a cheap lead ammunition when jacketed ammunition has a much higher profit margin. So, they let the smaller ammo houses deal with lead. Without the huge capacities that the big boys have, they cannot leverage the same economies of scale, and their lead ammunition costs almost as much as the mainstream jacketed ammo. When the consumer looks on the shelf, they perceive a higher value in the jacketed ammo. Unless they are going to shoot a few hundred rounds a week, they end up with jacketed ammo.
Handloaders are value minded as well, and casting your own bullets from lead weights drops the bullet to a low cost. Also, since casting bullets is typically done in their free time, they don't have to deal with labor contribution to the price. This makes the home cast lead bullet extremely cost advantageous.