The majority of people hate & envy the wealthy because the wealthy can do things & have opportunities that they don't & won't ever have. They also hate the wealthy because they live a charmed life without socioeconomic worries while they have to worry constantly about making ends meet, paying bills, & worrying about falling through the socioeconomic cracks. Remember, the majority of people are one-half to three-fourths of a paycheck away from homelessness. Wealthy people don't have this problem. In fact, they have monies for the necessities, luxuries, savings, & investments. The majority hate the fact that there are people who are not constantly struggling socioeconomically but are living a rarified socioeconomic life.
They also envy & hate the wealthy because the latter are living the life that they dream of. They deem that wealthy as lucky while they are cursed to a purgatorial fate. They actually hate themselves & their paltry lifestyle but instead of improving themselves educationally & socioeconomically, they displace their hatred on the rich because they are living a desired life while they are on a constant socioeconomic treadmill which stays the same, with instances that are changing for the worst. They may even feel that THEY should be the ones who are wealthy. They figure that if they AREN'T wealthy, why should anyone else be !
They also hate & envy the wealthy because the latter lead more interesting lives whereas their lives are very monotonous because of their socioeconomic standing. They feel very constricted because they don't have the money to do as they desire. They have to live within limits whereas the wealthy can lead unlimited lives because money is simply no object to them. They see the wealthy as living a completely, boundless lifestyle with the sky being the limit. They know that because of their socioeconomic condition, they have to live proverbially near the ground.
They envy, even hate the wealthy because the wealthy have the socioeconomic freedom to pick & choose as they please as opposed to them who must take what is dished out at best or being satisfied with the crumbs of life. They know that they are socioeconomic slaves because they don't have sufficient funds. They exist at the behest of those who hold the socioeconomic strings while those who are wealthy can pull & manipulate the socioeconomic strings.