Maybe he's saving better material for himself.
In order to save material and labour, railway vehicle designs were simplified.
Components made e.g. from metal, plastics or fibrous materials can be used - with the same functionality - to save material and weight.
Another feature of Motie technology is that, to save material and weight, devices perform multiple functions simultaneously, such as being both structural components and sensors.
Which is pretty far because they saved material on that dress at the top in order to give it a full, floor-length skirt.
The system is designed to save material - primarily office records - that has been flooded or hosed down during a fire.
This foresight saved much important historical material from destruction when the offices were burnt out in an air raid.
To save material, Shirazi had to try the ignominious retreat 15 ... Bf8.
The triangular pattern is very efficient because it retains rigidity while saving material and therefore weight.
H&K pointed out that the tower not need be as tall, thus saving material and labor.