Selective service is not the draft. It is used as a way to preserve the draft in case of national emergency.
The American Revolution was pursued in large part due to “taxation without representation. To disallow taxpayers (those that pay more in than they take out) from voting would be the same situation. Similarly, to disallow those who have long been subject to the government in their work life to vote because they have aged past fighting is the same.
Aging out of voting also robs the nation of needed perspective.
I cannot agree with your idea here. I could easily see taking away voting from non taxpayers, but the military and age guidelines are anathema to a free citizenry.
Selective service is not the draft in the same way that registration of firearms is not the same as confiscation of firearms. I am not suggesting making the change by fiat, but by vote as a matter of conscience. You would vote to give up the franchise to those whose lives might be thrown away by act of the State. It’s kind of akin to the segregation era. Everybody had the vote, so what was the problem? Well, it was a big problem if you happened to be black. Look—I’m arguing an absurdity to point out what I see as a basic injustice. It’s an equal protection issue. If men must register, women must register, but really nobody should register. Age was just kind of a toss in when I should have simply limited it to barring women from the vote, since essentially all living men have been subject to registration. As for older folks having valuable perspective, that is often true, but there is no shortage of old fools.