Lyric discussion by Me2 

coins on the eyes referr to death..a coin for the boatride across the river styx. nothing to due with drugs..its toiling in mans work..down in the bayou. the two "boys"..doesnt the song further speak of two men. a father and a son..both denying mercy to one another. they died for lack of mercy. the girl mentioned loses her innocence due to greed..or better yet. patience..its a shame to lose you way as a spiritual "child". ..its not about drug addiction..its about losing ones innocence

true in ancient greek belief the coins on the eyes were for the toll for the river styx, but in the song dave says it represents the money they owe...im going with cocaine

Drug Dealer's have also been known to kill and leave messages as to why the victim was killed, so the "Coins in their eyes represents the money they owe" really can't be taken any other way. You can search for a deeper meaning but that doesn't mean it is there.

I think this is a common case of trying to find something insanely deep in a song that is already deep enough. The song is about being in trouble, all the verses line up with that.

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