Satoshi (or one of his friends) owns 5% of all bitcoins that will ever exist.

I wouldn't call it a get rich quick scheme for its founder(s) because I doubt they could have known it would take off the way it did.

But, at this point, I don't know that intent matters. Imagine if Bitcoin really did become a dominant currency... one guy would own 5% of it, a deflationary currency! The "fiat billionaires" don't come anywhere close to that kind of concentration of wealth.

Doesn't he deserve it? If you were to launch a world-changing project at the cost of disappearing completely, wouldn't you want to reap some benefit from that project if it ever succeeds?

'Satoshi' as far as we know is a fiction, it could very well be a psuedonym for an entire team of unknown size

Doesn't matter, you can reduce it down to the wallet. (At least) someone has (or at least has at one point had) access to it.