If the salary is paid through Bitcoin but calculated in USD, then I think this isn't an issue. It would be the same as our signature payments: calculate payment in USD, but payment made in Bitcoin. I think this would be an advantage of saving Bitcoin as well if the receiver wants. All the funds we get from salary don't always need to be spent. So after spending the necessary funds for family, the rest of the funds could be saved for the future. So when Bitcoin pumps hard, they would have a handsome amount in their hand. It's like accumulating Bitcoin in a DCA strategy.
Issue is how long people are ready to hold their bitcoin after receiving it as salary payment and how they are aware of Bitcoin price volatility.
If they are fully prepared with those challenge, they are very ready to receive bitcoin as payment of salary. There is a famous advice "Invest what you can afford to lose" and with Bitcoin as salary payment, I think of another advice "Only receive bitcoin as your salary payment if you can afford Bitcoin price volatility".
Then remaining steps are doing it consistently over a long time, and it will turn to be Bitcoin DCA like Bitcoin investors.