Involunatary? The IRR is voluntary. You know you might be called up in case of war...but then don't expect the liberal reporters to understand that...
No citizen of the nation is immune from serving legitimate authority. The pecking order for military service and mobilization is active duty, Regular Ready Reserve, Indivdual Ready Reserve, Draft, general population. Each level of the pecking order has its advantages and disadvantages.
The Regulars, have an advantage of being the best trained, equiped, supported, and able to deploy within 6 hrs to 2 weeks of decision to deploy.
The Ready Reserve typically take 2 weeks to 3 months to set foot on the battlefield and with various options of how to deploy,..by unit, specialty, or individual.
The IRR typically takes 3-6 months to deploy, with reassignment into units they had not previously been assigned as a member.
The draft takes about 6 months from selection to deployment and the individual has less control on his assigned duties or unit.
The population as a whole simply meets the demands of martial law when appropriate by legitimate authority.
In each category, less individual freedom prior to commitment to hostilities is frequently exchanged for more individual security and less individual risk during hostilities. The longer one is a member in the service, generally the more authority one has within that domain up to their capacity. The more longevity in service, the better placed one will probably experience to match individual skills, ability, responsibility with authority.
Far better a draft in advance of war, than response to foreign aggression on friendly shores. Should that occur, it really won't matter how much people argue politically over events, ...events will tend to overpower the politics even to the point of loss of freedom and rights in subjecation to illegitimate authority.