Because the tax payer has paid for nearly all of this and the goal was certainly not for some billionaire couple to get into the hundred mile high club.
Yes, the goal was for everybody to get into the club. Billionaires wold just get there faster, for a fee. Similarly like it happened with aviation. Sergey Korolev was pretty comfortable with the idea.
Aviation gets us from a place where people live to another place where people live. Everyday people are still not going on tourist visits to Antarctica. There is no reason to believe everyday people will go on rockets that takes them to space in any foreseeable future.
If it would be cheaper and safer they would; I do not know any billionaires but I know a lot of people who went to Antartica as tourists. They would go into space as well, but currently it is not only dangerous (compared to many or all modes of travel we have on earth?), it is only feasible for billionaires.
