This is not entirely true, I would say it depends on the personality of each person. There are rich people who are very arrogant and extravagant because they always think they have a rich background, even if they fail, they still have another way to get rich quickly.
In the previous post I said that it depends on their family's upbringing and most of them will end up with a parenting style that is fully provided by their parents and this parenting style is what makes them understand how to respect others and not be arrogant. Of course it does not guarantee that everyone can behave well for those who are born in rich families or those who struggle to earn wealth with their efforts and hard work. Education is important so that they are able to respect everyone, both employees and anyone with whom they have a relationship.
The last point you mentioned about the rich thinking that even if they fail they have a chance to struggle again because their parents had a lot of capital will also end up failing, the concept is not how much capital they have but how they can thrive. Without a vision and mission, any business that they develop will end in failure, because they do not have a concept in developing the business they are living.
But there are also people who succeed from poverty and are very understanding because they have gone through a lot of suffering and difficulties in life to get where they are today. Therefore, they will always know how to treat others and their subordinates with humility. They understand that scorning and belittling others does not make them more respected.
Back to the upbringing factor and indeed not everyone is the same, both rich people who are inherited by their parents and rich people who struggle with their hard work, are arrogant and like to belittle other people are a form of disrespect for oneself and because of this this is the factor that will destroy them. The point is I see how someone has ethics, empathy and mutual respect for one another, when the parenting they receive is good then I'm sure they will behave well to everyone.