Jones represents capitalism. He owns the farm (the means of production) and all the animals work for him. From the animals' perspective he is a leech who does no work but benefits from their labor. Jones' problem is the Old Major (Marx/Engles). They/he present/s the philosophical underpinnings of socialism --- "from each according to his ability, to each according to his need." The animals, presented with the leadership of Napoleon and Snowball, are convinced that Jones (capitalism) is their enemy and that he should be run off so the animals can run the farm for the benefit of all the animals.
Needless to say, this is not how it went. Orwell had seen Socialism face to face, and it did not measure up to its promises, and this may be why he wrote "Animal Farm."