Theoretical people
When performing utilitarian ethical calculus it is necessary to prioritize the happiness of the living over the unborn, the dying, and the people of the future. Quality of life for the currently living is the most important goal.
Concerns regarding the well-being of people who have not yet been born into the world are referred to as theoretical people, future humans, and other monikers.
That is not to say that future generations should not be considered, only that the living should not be asked to make sacrifices to their own happiness on their behalf if there is any way to avoid it. Any problem in society should be solved in a way that does not negatively impact quality of life for the living, and if it can't then people won't buy into it anyway.