"best in the world" is not saying much at all, i agree. But if i am wrongly accused, I'd much rather go with this justice system, possibly some western european one, or Australia. Those are my best shot. As if anyone was asking me 
We are very likely to acquit guilty people though, that's the drawback of this, but I am looking from the standpoint of the wrongly accused.
By the way, prosecution in criminal cases is always by the state, so money is not a factor on that side unless the case becomes very public. Money is still a factor on the defense, but even as a poor homeless guy, comparing apples to apples, better here than anywhere.
"The trouble with socialism is that eventually you run out of other people's money" -Margaret Thatcher