I take it you mean that the PO has a casting vote, and as such ought to be an elected representative given the influence they may occasionally exert. It's a fair point, although I gather there is a convention (again, I wonder where it came from...) that means the PO votes for the status quo. I think this happened with a previous SNP budget. The point being that if the PO has no discretion then we might as well remove the casting vote (and therefore the need for the PO to be an elected MSP) - since a majority of at least 1 is required the outcome would be the same wouldn't it, or am I missing something? I guess it's not likely that we'll see many casting votes in the next 5 years though!