Richard, that wasn't a very satisfying answer. If a union for a trucking company struck, are they or are they not interfering with others' rights and liberty? I need a better sense of how this works out in practice.
DR
Depends on the contract. If you are a hospital, you would want to include in your contract that a doctor who ceases to work without advanced notice or reasonable excusable absence (emergency, sickness) is liable for damages to a patient.
If you are a doctor this should be an acceptable contract. Likewise, if you are a doctor, you'd request a wage review.
If you are a hospital, there is no way you'd risk a doctor strike, because although under this contract the doctor is liable; a full strike would render the hospital itself liable as well. Not to mention, it would increase costs for the hospital to have to hire temporary doctors or pay overtime.
You'd think this makes unions impossible, but if a majority of doctors put in an advanced notice (10, 20, 30 days), the responsibility for damages or injury falls upon the hospital, so the doctors still have magnified bargaining power collectively.
Of course, there may be circumstances where a specialized doctor is directly responsible for a critical patient, and a 20-30 day notice would be morally unacceptable.
In this case, the patient or someone on the patient's behalf could initiate civil action against the doctor and/or the hospital, as they are both responsible and there is no other reasonable or timely relief for the patient.
The fact that the doctor chose the assignment can easily be construed as an implicit (or silently understood) contract between himself and the patient, particularly if there is no reasonable or timely substitute for the doctor's services.
So in this situation the doctor would have to decline to participate in the strike, and the hospital would have to do whatever is possible to avoid this particular doctor from leaving.
Note, however, that neither the doctor nor the hospital "have to" attend to the client/patient; it is simply the case that the doctor and the hospital are liable should they decline to attend to the patient.
As to a shortage of medical assistants to the doctor, the hospital and not the doctor is liable (unless from some strange reason, the doctor is expected to hire his own assistants... but that's tangential).
So unions don't have any special status other than what is accorded to them by the individual members of the union.
If a union is interfering with you, influencing your circumstances, you can only expect remuneration if they are depriving you of a necessity to life or if they have initiated force against you; thus a hospital can't sue a union if the hospital loses money from lack of business, but someone who expected to recover under an implied contract could sue an individual belonging to the union for breaking that contract.
This seems fairly just to me. Responsibility is assigned via causation unless specified otherwise in a contract. This isn't arbitrary.
An implied contract here consists of what lawyers call "a meeting of the minds", subject to evidence and subject to common practice in the locality.