Player balance not interpreted

[SlimeDog]

command /test-access <text=none> <text=none>:
        permission: blackdog.op
        trigger:
                set {_DEBUG} to false
                set {_DEBUG} to true

                set {_player} to arg 1
                if {_player} is "none":
                        send message "usage: test-access player restricted-world"
                        exit
                if {_DEBUG} is true:
                        send message "You set player to %{_player}%"

                set {_world} to arg 2
                if {_world} is "none":
                        send message "usage: grant-access player restricted-world"
                        exit
                if {_DEBUG} is true:
                        send message "You set world to %{_world}%"

                set {_BALANCE} to money of {_player}

                send message "Balance is %{_BALANCE}%"

Compiles without error, but returns "Balance is <none>". What am I missing?
[doublepost=1514229751,1514221924][/doublepost]OK, this works:

command /test-access <player> <text=none>: