If a company implements such a system for their employees and I am one of the employees of the company that will implement it, I will be happy. Of course it would be easy for me to save Bitcoin.
But, it is impossible for that to happen right now, because if that happens it means that the importance of fiat will be gradually eliminated for sure. This is what I see, of course it can be seen that Bitcoin can be used as money even digital so Fiat will lose a lot of sense in the eyes of the majority.
With HD wallets, your company can do that but as a staff and receiver of their Bitcoin payment, you must be a Bitcoin investor and understand that price can change a lot within a few hours. When you understand all these, you will not feel disappointed and panic when a few hours after receiving your salary payment in Bitcoin, its temporary value can drop to 10% or 20% lower.
You must have plan to use those bitcoin from your salary. Like when price drops 10% or 20%, you will not have to sell it to have cash.