Office workers on 50th floor will certainly be highly motivated to pay the price. Also, there will be medications which mitigate the urge to die (What's the word? Antipsychotics, I guess).
I agree, there are many details which an author will need to explain. People can be protected by mighty authorities and live in a safe environment. But those medications will be prohibited of course. In other case people just will not be working!
Pity I'm not a writer, I think it is a good idea for anti-utopia about the world where people work to get a permission to die.