Are we sure that it is a RAM quantity issue? I only ask because I still have a hard time believing that high end, graphically intense games can run for hours on end with rocket speeds and no issues yet a web browser with a few tabs open brings the RAM to its knees? Really?
I'm not denying there is a safari problem but I'm not sold on it being The amount of RAM. It's very possibly how the RAM is managed though. I can get on board with that a lot easier than the quantity theory.
I don't think it's a physical ram issue either as Google Chrome crashes as well. It could be a memory mgmt issue within iOS 7 but i'm not a programmer so that's just a guess.