of the present war. The scope of the defence power was discussed
by this Court in Farey v. Burvett (1), where Isaacs J., as he then was,
in a passage which I quoted in Andrews v. Howell (2), said that in
considering whether a measure is supportable as an exercise of the
defence power "if the measure questioned may conceivably in such
circumstances even incidentally aid the effectuation of the power of
defence, the Court must hold its hand and leave the rest to the judg-
ment and wisdom and discretion of the Parliament and the Executive
it controls - for they alone have the information, the knowledge,
and the experience and also, by the Constitution, the authority to
judge of the situation and lead the nation to the desired end" (3).
Applying this test, and the test laid down by the other members of
the Bench in that case, I am unable to see anything in sec. 4, whether
it be read alone, or in relation to the rest of the provisions of the
Act in which it occurs, or in relation to the group of statutes with
which that Act is associated, which justifies the conclusion that it
is a colourable and not a real exercise by Parliament of the defence
power. It is notoriously essential, for the effective prosecution of
such a war as is now being waged, a war in which the continued
existence of the Commonwealth and its constituent States is at stake,
that the whole resources of the nation, whether of men or of things,
should be marshalled and concentrated upon war effort. If the
Commonwealth is to wage war effectively, it must command the
sinews of war. The taxing of income is an important source from
which the funds required for war purposes may be drawn; and the
other Acts which have been brought in question show that the
Commonwealth Parliament was determined to make unusually large
drafts upon this source. In these circumstances, I see nothing
sinister in a provision which enables the Commonwealth to take over
from the State service and place under its own exclusive control
for the period of the war, such of the officers employed in that service
as it may specify, if those officers have been engaged on duties con-
nected with the assessment or collection of taxes upon income, and
are therefore, presumably, specially qualified to assist the Common-
wealth by performing this essential service. Nor, if the section be
read with an unjaundiced eye, do I see anything sinister, or anything
suggesting that the section is intended to be used colourably and for
the purpose of destroying each and every new State income tax office
as and when it may be created, in the provision that the power may
be exercised at any time and from time to time (although only during
(1). (1916) 21 C.L.R. 433. (2) (1941) 65 C.L.R. 255, at p. 263.
(3) (1916) 21 C.L.R., at pp. 455, 456.
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