The revenue in this business is mostly already inside your existing clients
Sanctioned headcount and deployed headcount are not the same number
Almost every manpower supply firm has contracts running below their sanctioned strength. A site is approved for one hundred and twenty operators and is running at ninety-four because six people left last month, four never joined, and sixteen positions were never filled after a shift pattern changed. Each of those heads is billable revenue that the contract already permits.
The reason it persists is that nobody looks at the gap as a number. Recruitment is measured on joinings, operations is measured on complaints, and no one owns the difference between sanctioned and deployed. Putting that figure on the site record, refreshed weekly, converts a vague operational grumble into a specific target with a name against it.
Attrition is a demand engine, not just a problem
In high-churn roles, replacements are a continuous stream of requirements. Handled reactively, they arrive by phone call to whoever the site HR happens to know and get filled late. Handled as demand, they are a predictable pipeline, and the vendor who fills replacements fastest is the one who gets the next expansion.