oomis,
The drastic measures you mention could be as simple as NOT teaching our children from Day One that it is so assur and untsniusdig to talk to the opposite gender, that they must always be segregated from each other, rather than having mixed properly supervised events where they can meet and socialize.
One of the most common negative reactions to NASI (both projects) seems to be based on negativity towards the whole idea of using shadchanim.
Firstly, this is a time honored minhag in klal Yisroel, firmly rooted in the Torah’s ideals of tznius.
Secondly, it has not been demonstrated that if left to choose their own mates, singles would be more likely to choose one closer in age than those who go through shadchanim. AFAIK, the gender disparity is at least equally large among the more modern crowd, which by all accounts suffers terribly from an overwhelming number of older singles.