"lack of action" is a correct and usable sentence in written English.
You can use it when you want to describe when no action is taken in relation to a certain situation. For example: "The lack of action to reduce emissions has caused an increase in global warming."
Debate over Spanier's actions — or perhaps lack of actions — has angered and puzzled many students, faculty members and alumni.
Najmedin Meshkati, a professor of engineering at the University of Southern California who specializes in human factors, pointed out that in 18 pipeline accident investigations from 1998 to 2006, the safety board found that actions or lack of actions by the operators, or the computer systems used by operators, played a role in 10 of them.
"What I fear is that this president's actions, or lack of actions, on foreign policy actually are creating a very unstable world".
If compared to those successful experiences in Europe, this situation could be explained to some degree by the lack of actions on key sectors, clear responsibility allocation schemes, practical and efficient subregional cooperation and a strong funding mechanism.
Finally, following the arena perspective, one implication of our results is that it is important to identify individuals and groups who are implicated by actions in a specific arena that is, who are affected by actions or lack of actions in an arena but who are not active in this arena.
This lack of actions was justified by decision-makers saying that they not want to "cry wolf" or to risk creating panic in response to warnings; however, both these claimed outcomes in the communication of emergency warnings have been shown previously to be essentially myths (Atwood and Major 1998; Mileti and Sorensen 1990).
