But the relative value of those same labor (hairdresser, daycare worker) changes. If my labor as a tech worker was $50 / hour I'm willing to pay $30 / hour for a haircut. But now if I make $100 / hour I'm willing to pay $60 for the same haircut. And in both situations I still need a haircut and the hairdresser is still the place to go to get one.
Which is fine right? If both wages just keeps up with inflation, the gap will increase by the same amount as well. In fact in this particular case I wouldn't even expect the hairdresser's wage to increase the same amount proportionally, which is also fine. Not all wages should increase at the same rate.