Most people nowadays don't want to live as farmers anymore. The scenario is completely different from the past century, where the countryside was the home of big families who worked on the fields. The tendency is that youngs migrate to larger urban centers, leaving the countryside empty. So there is a minority of wealthy businessmen who own technological resources who purchases those lands and start growing crops and breeding animals in large scale. Without concurrence, they feel free to put the prices they wish on the products.
Of course there is also the taxes factor implied, which raises production's costs, but it doesn't justify the fact food is really expensive (and getting more and more expensive, while quality decreases). More competition would balance prices and quality, but that is a game for big players most of us don't have access to, so it's more convenient that such big players just organize themselves in lobbies.
Which shocks me. As someone who lives in a populated big city, it baffles me that people want to live in the cities. I do not see many benefits of it, maybe medical care here is a lot better considering there are many public and private hospitals all around me, so I agree that medical part is better here. But aside from that, life sounds a lot better as a farmer than what I am doing right now.
There are two reasons why I am not becoming a farmer, first is I have no clue how to farm, never seen how a farm is managed, never even played those farm manager type of computer games, so I am not a farmer because I don't know how to be. Secondly, it requires capital even to be a farmer, you see that as a low job, but the costs of a farm, is a lot. From tractors to seeds to other machinery, to buying a huge plot of land, many many things cost a lot before you make your first income.