These individuals are showing what is wrong with western societies apreciation of the art form of music. They show that you can have no talent, and as long as you look somewhat attractive to the opposite sex and are over produced and extensively marketed can do for a career. The music they write have no actual artistic quality to it. lets take the one song I do know of Miley Cyrus, See You Again, it is crap, guess what it scares me when you listen to the lyrics and you realise that it is a young girl that is singing those lyrics that are about topics that should be well above her age.
As to the topic title, they don't have to be doing anything right, there is a saying about all publicity being good publicity, Miley Cyrus has proved that again with those photos from a while back. The Jonas Brothers are up for a grammy for best new artist or something, we all know that the Grammys are a crock of shit, and dont mean a thing in terms of what is actually quality.
The idea that they are doing their job and entertaining is bullshit, their job is to push as much useless merchandise at all the prepubescent girls out there, there job is not to entertain, their job is to be the biggest salesperson in the world to prepubescent girls that have no disposable income of their own and must ask mummy and daddy for the list of products that are pushed.
Radio stations, especially top 40 radio stations don't play what is good, or is even listenable, they play what is going to rake in the most revenue, top 40 radio stations determine what the top 40 is, from what I understand most of what make up the singles charts is the radio play, so if a record company, lets say it is the guys that have Miley Cyrus on their roster, they pay the top 40 radio stations to play what they want them to play, it is nothing to do with whether they entertain or not it is whether they have the right look and how much the recording companies wish to push as being what everyone wants to listen to.
A truer indication of whether they are doing a good job musically is to look at the album sales figures, while an album may go platinum in a country where there is a large population base like the US, Brazil and the UK, the amount of time it spends in the top bracket is more important, if it peaks quickly than drops off just as quickly it shows that the demands on wimpy parents pockets by prepubescent girls is the driving force, not due to any mass entertainment it is targeted entertainment at its most sinister. It works on the basis of exclusion and inclusion.
This means that it is not Miley Cyrus nor the decidedly shit Jonas Brothers are doing something right, they are just part of the machine that just keeps ticking over, they have no staying power and will be gone once their current fan base grows older. This happened before with another band that was around did a similar thing, they were called Hanson (sp?). Remember them? if you do then you know that they were a flash in the pan and offered nothing more than the fact that little girls were told that they were hot, and they clamored after them. not much different from the Jonas Brothers, except Disney has added in something that worked as well for the infinitely more talented foursome of The Beatles.
So to sum up quickly, the bottom line is, the two entities in question aren't doing anything right, nor are they doing anything wrong, they are not producing anything of any merit whatsoever, and are just there as a cash cow for those who own the rights to the royalties and the album sales.
This is a British Diagram but it gives the general idea
generally speaking the Artist section is broken down more, with writers and band members getting split. So the majority, close to 50% goes to the recording studio since unless they are on a true independent label, the recording and distribution of the album is going to be one and the same. So it is in the best interest for the recording industry to push the likes of Miley Cyrus and the Jonas Brothers because they give good short term yields in the profit margin.