When did non-FP pathologists all stop getting paid by the government (at least to some extent), and stop being influenced by government actions? I'm not so sure the comparison is entirely flawed, but certainly there are significant differences between most forensic paths and most other pathologists in terms of this thread.
There is a proportion of FP's who contract with not only counties or states, but also hospitals to provide services. Yes, most of the time even a "private" FP office depends on a county budget, and it's not as simple as increasing your workload to increase your income.
As far as the workload across the country being managed, one has to remember that in some areas the local system is so entrenched that they don't see not examining every apparent unattended natural, MVA, suicide, or even some homicides, as a problem. If they do see it as a problem they're not going to let the bodies pile up or call the media, so it doesn't become a major political problem. And if those bodies are examined they might be examined by a local PCP, surgeon, non-boarded but perhaps residency trained pathologist, or a non-FP pathologist. Even some large MEO's have non-boarded "pathologists" on staff to help with the workload. And as mlw indicated, there are people doing far, far more than the max as published for NAME accreditation (325) -- some in the range of 600-700 per year, and with at least one office undergoing some major MAJOR issues and overhauls that average per pathologist is probably on the order of 1000-1250. Which is totally untenable.
But as the job market goes, it's pretty good in terms of finding a job. Less good in terms of probably having to move a significant distance for every job change. And although historically the salaries have been sub-par, the average starting salary seems to have increased a bit every year since I started checking those sorts of things. Precisely why that is, despite the economic hits lately (which led to some hiring freezes and other cost-saving measures here and there, but doesn't seem to have cut into salaries that much, as far as I can tell), I don't know -- possibly more political recognition of how a good/bad death investigation system can help/hurt those holding the purse strings, and possibly CSI effect. On the other hand, the salary ceiling is relatively low except for those rare few who develop a large private consulting business -- most people will eventually do a "few" private cases or be paid privately for testimony in civil cases outside the responsibilities of their main job, but not that many make enough to -only- do that.
What we can reliably gather from the FP situation and apply to surg path, I don't know. I do think the situation is more complex than it at first appears. While not immune, FP seems to be more resistant to mid-level creep or other specialties cutting in -- if anything, the trend has been toward *more* places requiring board certified FP's rather than replacing them with unboarded individuals, other physicians/surgeons (of course how many would really want to do it?), or PA's. Anyway. Interesting topics without a lot of definitive answers right now, IMO.