Ryanair could learn from Yeti Air and other airlines in Nepal. I've just checked in for an internal flight and was 10kg over my 20kg allowance. On Ryanair that would have cost me a whopping £100 but with Yeti it was just a shrug of the shoulders and a smile.
When I did the same with Summit last month it cost me just £4.
Admittedly there's a higher chance of death or serious injury with these airlines but, if you survive, you've made a significant saving.