No - Just Heads of Department and the staffs therein. IDA, FAS etc are not civil sevants, they are semi-state organisations who operate under a certain degree of autonomy. I cannot say what Ministerial travel arrangements are but I am just talking about the civil and not public service.
Where I work, all travel arrangements are scrutinised and no excess is allowed e.g. only one car carrying multiple persons where feasible. Overall it would have to be done as cheaply as possible and within reason. There would have to be justification otherwise. It strikes me that there was a complete lack of controls at FAS regarding T&S.