I dont see no difference in becoming salary in BTC or $. Now with as less as 0,5$ you can convert up to 500$ into BTC and the other way around. Yes, there are a couple of click to be made but still, it is 0,1% commission.
So if my salary is $500 and I can spend the whole $500 instantly, you're asking me to wasting my time to convert the money into BTC and pay $0.5, which left me $499.5 to spend and I also need to spend <$0.1 for every transactions I made?
If I received my salary in Bitcoin, this will encourage me to spend it.