There are no means to staffing a military outside of voluntary enlistment. So, once again, the answer to your question is: none.
You are right that the premise is the same in both discussions, which is why you'll find me consistently against both the draft, and any other sort of compulsory national service mandated by the government. I was willing to make a distinction to provide some clarity, but placing the two issues side by side only hurts your position.
Am I to take your response as meaning that you are both for the draft and for some other sort of compulsory national service, whether it be military or civil?
Then the natural conclusion to your position is as I stated...
The government has a Constitutional mandate and responsibility to protect the freedom and liberty afforded by that Constitution.
The government has no power or ability to ensure it has the means to do that.
Result...defeat or surrender to an enemy.
As I said two mutually opposing beliefs yet held together with no regards to the inevitable conclusion.
I am in favor of a draft if needed simply because the Constitution does mandate or assume the existence of a military force.
The constitutionality of a draft in light of that has been tested and adjudicated.
A national non military compulsive service would be in addition or would have to find its constitutionality elsewhere if challenged.
As far as the premise then again it is a matter of the merits or needs of such and of that I am of no real opinion having given it no thought really.
I am inclined to think it may however have a positive impact on todays society if it helps instill a sense of order and responsibility that the welfare system has destroyed in our inner cities.