[haldujai]

What profit in public systems and with non-profit insurers is driving increased screening?

Nihilism aside you seem to have a deep misunderstanding of evidence based medicine. While cost is a consideration in population-level screening programmes you seem to be ignoring that it is balanced with benefit and is not decided by insurers but rather the USPSTF.

> what the workers care about is effectively meaningless because the workers are not in charge

The agency in charge of screening (USPSTF) takes the work-product of physicians and other health professionals (workers) researching and building evidence on health outcomes (what they care about) which establishes the standard of care that is then forced down by the government onto insurers.

On an individual level I can also advocate as a physician by recommend screening regimens to patients who's care I am involved in and force the insurer to pay, which is what we did for breast screening before the USPSTF caught up.

Sure if you want to take a reductionist view I am using profit (specifically the fear of liability) as a tool to force the insurer but that does not mean what I care about (reducing breast cancer deaths) is effectively meaningless.