If you look at inflation only, that is equivalent to saying that workers should have gained absolutely nothing from technology and efficiency gains made in the past 70 years. But obviously we know that workers are far more productive today than they were in the 50s, and the extra productivity per worker is reflected in GDP.
I'd be curious to see the numbers for my assumption, though.
But yeah, the original comment we are replying to doesn't have much going for it.
[0] https://www.businessinsider.com/if-people-knew-the-actual-in...
In any case, I agree that inflation (or more precisely, the price level) is a finicky statistic to agree on. So if you are making an argument, it's better if you can avoid inflation.
Eg people like to argue whether median real income has stagnated or not. And that crucially hinges on inflation. But what they actually want to talk about seems to be whether workers get 'exploited' more. So we can instead look at the labour share of GDP over time. No inflation adjustment necessary.
The article you linked to is somewhat hilarious. It suggests eg China is cooperating with the US in massaging American inflation numbers. (See point 2 in their list.)