I saw something similar but the person used the tiny silicone bands that little girls use for their hair. I tried it and it works. I will look for the link when I get back from taking my car in for service later today. Btw they were indeed inserted whilst knitting but i think it would be possible to retro stitch them in, you would need patience.
No slip slippers,using silicone hair bands
There are many discussions of how to make socks that are not slippery. I use little rubber (silicone) hair bands knitted into the soles. Here is a You Tube video that I just made to explain my method: