They are wrong, as dismantling the current system would also benefit them. It would benefit every single person alive. Even the true owner class.

One huge lie that helps sustain the current system is the idea that the wealth class are acting in their own best interests. They may often mistakenly think that they are but their lives would be better and their minds calmer if things worked differently. We all understand intuitively that children do not perfectly understand the impact their actions will have on their own wellbeing and that they require guidance to avoid falling into harm and to grow to have the skills to make better judgements for themselves. What we miss is that we often tend to think that those better judgement skills magically snap into place in adulthood and are perfectly evenly functional across all situations for all people. A moment’s reflection makes it very clear that cannot possibly be true. All of us do foolish things that direct us away from our own best interests to some degree and frequency and we can often clearly see when others do so but are blind to it. This is just as true of some idiot billionaire ruining their own home as it is for anyone else. They are no more infallible than any of us.