Think about it this way, in a very similar, live example:
It is common practice to pay a fee of 0.5-2% to a wealth manager. In practice for many people this fee is worthwhile and wonderful - the benefit is a safely managed and vigorously growing pool of assets.
Is a wealth tax as described by the author really so different? In one case you pay a fee to the manager, in the other case you pay the fee to a more abstract/distant manager (the social system). In both cases, that small fee (small if everyone is generally competent and the wealth grows) is what empowers further growth.
No sane, logical person complains about paying $0.20 when in return they get an extra $0.30 back. In this case, I suspect the author is trying to justify receiving that hypothetical $0.30 without having contributed their initial $0.20. Embarrassingly simplistic, selfish, and self-centered.
Reading that blog post, I’m reminded of the occasional, deluded person who believes that they alone are responsible for their successes and good fortune. In reality, all successes are collective accomplishments. This is a fundamental fact about human life.