If you make less money than the parent does, and live in the same country, than you essentially are taking their money, through their higher tax burden that pays for services (like roads and public schools and firefighters) that you almost certainly use or benefit from.

And that's a good thing! But I think higher earners should have more money taken than is currently the case. Wealth and income inequality are largely a result of luck and opportunity, not raw talent. An equitable society should find ways to mitigate those effects, which have only gotten worse in recent decades, not better.