The phrase "abstract demands" is correct and usable in written English.
It can be used in contexts where you are discussing theoretical or conceptual requirements that are not tied to specific, tangible items or actions.
Example: "The project faced challenges due to the abstract demands placed on the team, which were difficult to translate into actionable tasks."
Alternatives: "theoretical requirements" or "conceptual expectations".
However, what these protests add up to is a purely negative gesture of angry rejection and an equally abstract demand for justice, lacking the ability to translate this demand into a concrete political programme.
As teachers, we have experience of nursing students describing medical science courses as being more abstract, demanding and time consuming.
An item of daily use could resonate more with all classes of citizens than an abstract demand for greater political rights.
It is not clear, however, that the possibility of abstract cognition demands Vision in God.
His often abstract style demands an attentive viewer, with imagination and empathy, and stimulates one's creativity.
The life process depends on production but in a money economy production needs to be financed; production has to answer to an abstract monetary demand on pains of losing financing (was it profitable?); and its results can't be put to human use unless the purchaser has money.
A recurring element in a number of the much-admired, widely circulated cartoons about Modern art that Reinhardt published is a drawing of a mocking businessman who laughs in the face of an abstract painting and demands to know what, exactly, it's supposed to represent.
Abstract: The increasing demand of expressive virtual instruments has led the research and development of powerful and sophisticated technologies.
Traffic matrices, abstract representations of demand, are essential for network operators endeavoring to model, measure, maintain, and improve the efficiency of their complex and heterogeneous architectures.
"Abstract: The increasing demand on academics and researchers to publish has led to the development of fake journals (also known as predatory journals).
