Even the Soviet-Union would never have done this!
No government would sell this idea !
NASA had huge problems after the Apollo 1 fire, even when it wasn't intended. A one way ticket is a sure way to ask for problems. In fact, it looks like that's the intention: sending one person in a one way trip would allow an organisation to get what's needed to bring him back alive, because it would motivate the public to pay for it. As long as the mission hasn't started, there's no reason to bring him back; once it has, there is! Counting on that feeling is calling for blackmail.