ROB: I think you are confusing two disparate issues. There is room for a legitimate discussion regarding the number of people who our society can afford to support in long-term learning, though I have neither the time not interest in joining it. This conversation can only be productive when it is an attempt to determine what is in the greatest benefit to the overall health of our community.
However, you are being extremely naive if you think that this is the motive of Plessner, Lieberman et al and the voters they wish to represent. Anyone who lives here and interacts with their type is aware that their primary goal is to destroy the Torah community. The sole reason they wish to coerce Bnei Torah to leave Kollel and join the army is in the assumption that the experience will make them less committed to Yidishkeit. If 80% of Chareidim would leave Kollel to work, as they wish, but retain their current lifestyle and level of observance; they would consider the law a failure.
Your intentions may be pure, but be aware that the context in which you are stating them is joining hands with the modern equivalent of the Misyavnim.