No worries. As far as I can tell there is no presumption made that the worker can wait. The assumption is the worker has time preferences on the return of his labor.
Time preferences also show up in communist models.
There is no proof that voluntaryism will end in a economic model where the products of labor are taken from the worker and distributed (or even distributed 'equally') by a social construct.
As we discussed before demand is the 'pull' part of the system, and scarce resources will remain scarce unless the motivate to produce the resources is directly linked to the need. Social distribution uncouples the motivation from the need. As Hoppe mentions, you get less resources.
https://mises.org/system/tdf/9_2_5_0.pdf?file=1&type=document