"the idea was that into the first ship, the 'A' ship, would go all the brilliant leaders, the scientists, the great artists, you know, all the achievers; and into the third, or 'C' ship, would go all the people who did the actual work, who made things and did things, and then into the 'B' ship - that’s us - would go everyone else, the middlemen you see."
The Restaurant at the end of the Universe.
In the best volume of his trilogy of four, Adams introduce this type of people who all together constitute this pervasive "load of useless bloody loonies". In his fantasy universe, he cooked up this scenario where the other people just send the lot of them into a spaceship to crash somewhere else.
For some reason, among the middlemen, he introduced hairdressers and phone cleaners. Two respectable and useful occupations. Here is my list of useless bloody loonies:
Like in the novel, these usually make normal people's life miserable and depressing. They are a cancer for society, they are parasites, they are this brand of intellectually inept people who are worst than if they were not there in the first place: they are, literally, worse than nothing.
Here a more detailed list of corporations that embody all that is evil on this planet based on my personal experience: