Are there natural boundaries between the rich people and the poor people that prevent them from being friends or forming good relationships with one another?

We see it most of the time that people tend to be the closest with one another when they are of the same socio-economic standing, and that the well-off (usually) don’t welcome the relatively not-so-rich out of fear that the poor might take advantage of the rich, but it also happens the other way around, in that the poor get (usually) intimidated by the relatively rich—because of how these classes perceive each other they automatically set boundaries to protect themselves and avoid the other.