Corruption at its finest.
> I'm not fond of the continually extended jail time
This is kind of the point, because the bank (and I'm guessing ministry, politicians, etc.) seized assets, ignored or outright altered the terms of contracts, and participates in other shady business, the jail time seems like a convenient (and effective) means of suppressing push-back.
The spoils end up in private hands, those that were in charge of the banks, ministries, courts, etc. It is not only Dubai, you can see similar behaviour all over the world. But hey, if you want to play with the big dogs, you might get bit.