'Many who demand measures to ensure a higher conviction rate in cases of alleged sexual assault seem to want ..."

Don't know about that.  Do you mean, "Many who demand a lower "unfounded" rate to ensure a higher conviction rate ..."  Don't know that they'll see that, either. What that undoubtedly assures is more cases going to trial. 

It COULD be that a number of "unfounded" cases reflect that lack of evidence/low odds of success in particular cases.  Who knows how many women have been spared the soul-destroying experience of reliving their rape in a public court of law--and repeatedly being aggressively challenged on their recollections, their intent, or behaviour?