You guys forgot to put the 1-2% it costs to buy the BTC then the 1-2% to sell it! You also forgot to put the hoops you have to jump through to buy bitcoin. Much tougher then filling out a form at WU.
If we are paid with BTC in salary, then these costs will be eliminated.
Not true. This would only be correct if you were able to
spend your salary in bitcoin (which would require a much larger merchant adoption and a much more stable price for it to make sense to do so