From an 1847 Stirling Court case -
"The pursuer, Archibald Hill, engaged with the defender, H. A. Galbraith, Esq, from Whitsunday last to Whitsunday next at £10 money wages besides six and one half bolls of oatmeal, and other articles of food, fuel etc"
It wasn't simply a matter of wages - the "add ons", including rent free housing etc, played a part