In US terms I'm a liberal, and I agree there's a lot to question in this study.

I'd certainly want to see a replication with more thorough methods and more informed question design before drawing any conclusions.

I'm not even sure it makes sense politically. In this model, who are the swing voters? If older people have entrenched views and younger people don't vote, how does this information correlate to election-winning voter swings in the gap between the two?