I think a better option is for people to indicate what percentage of their salary they want to be paid out in Crypto currencies. See, if you get your salary.. you have to transfer money to an exchange to be able to buy bitcoins. This option from your employer allows you to do the same thing, but you are not paying the fees for that.  

So if you regularly buy a fixed amount of bitcoins every month, then this will be a good option for you. It just saves time and a little bit of money, if the employer does this for you.  

I will not do this with the whole salary, because some businesses does not accept Bitcoin payment.. so with them you have to convert back to fiat to be able to pay them for their products and services. (This will cancel out the saving in fees, if you get paid in Bitcoin)