The real question here is what does Hashem want from us. I dont know if he wants us to do scientific research on age gaps to force people to get married to people older than them. I dont know.
But i think the main focus should be thinking of ways to get these singles worthwhile dates. Which is mostly done by people who know them well. Just because we aren’t an “offical” shadchan we think we have to be “best friends” with a person to think of a shidduch for them.
My idea was that every couple, EVERY COUPLE has an obligation to have a list in their pocket at all times of five woman and five men that they know “well”. they should know these 10 people well that when they meet someone they can easily describe them and what they are looking for correctly. here’s the fun part, if one doesn’t know 10 single people this well, they are obligated to “find” single to fill up their list. by asking their married friends if they have any other single friends etc. and then meeting them and getting to know them. For getting names of the oppsite gender they will have to work together with their spouse.
I think this is a good way to get average people more involved. and the dates that come out of this are going to be less random than your classic shadchen.