No.
Permanent +50% MF and +50% Karma? Dream on.
Congratulations. Not only did you not read the thread’s contents, you didn’t even read all three of the words in the thread title. He’s talking about Mystic Forge recipes that use boosters to produce random crap that may or may not be valuable. Halloween had one, and it worked pretty well to dump off boosters the player considered useless, and did not negatively impact the economy. http://wiki.guildwars2.com/wiki/Mad_King_Chest
He’d like a permanent version, obviously not event-themed. I think it’s a good idea, but it would depend on the contents.