The phrase "most important purpose" is correct and usable in written English.
You can use it to describe the primary aim of a situation or the main objective of an action. For example, "The most important purpose of our trip is to collect data for the research project."
It also misses their most important purpose: to break the monopoly of provision within the NHS.
Charles believed that music's most important purpose was social; he wrote out the "ten purposes" of music.
This single, most important purpose of the EU has been so often dismissed, belittled or buried during the referendum debate.
Early on in "Spring," he writes: "To entertain, in its highest sense of providing sustenance for the mind, is the most important purpose a writer can have.
White House officials emphasized that the most important purpose of Mr. Obama's trip to Afghanistan was to visit American troops there.
Their religion is mild.In 1965, according to Gallup, half of respondents said the most important purpose of their church was to teach people to live better lives.
"One of the most important purposes of this whole preservation strategy is to maintain working farms.
"Rational, objective lending is one of the most important purposes of the banking system, and when you inject Congress and the administration into it, it effectively politicizes the process, which is not healthy," the BB&T chief executive Kelly King said Monday.
Proposing an independent module for reusing traffic light control knowledge is one of the most important purposes of this paper.
The Swiss radiologists rated the most important purposes for future teleradiology would be the (intra-organisational) distribution of imaging studies and the emergency readings followed by expert consultations and education.
Evaluation of the condition of complex electromechanical systems in the process industry is one of the most important purposes of condition monitoring, and is an indispensable step to ensure safe operation and comprehensive coverage capabilities of a system.
