I hear talking like the big guys we are here to defeat: this is not the FED.
If the economy goes wrong then let's give them some QE, then after a while QE2, then QE3 and so forth.
If we start raising the block size it will be like that in a way: tomorrow 2MB, in one week 4MB, you understand the trick.
This is not the $ and never it will be.
If it's needed to bring adoption forward then go ahead. Bitcoin will never succeed when adoption is hindered effectively. Sure there are potential problems, one has to deal with it like it happened all the time. And suddenly an arbitrarely setting becomes a breaking stone.