To be quite honest, I didn't know exactly what the difference is between the trip-lock and double-lock state pension and had to look it up.
It seems that with the triple-lock, pensions rise by the inflation rate, average earnings or 2.5%, whichever is highest. The double-lock would rise in line with prices or earnings, not inflation.
The reasoning behind it is that if we experienced deflation - with earnings and prices dropping - it would be unfair for pensioners to continue to receive 2.5%.
If state pensions were already at a point that was vaguely in line with average earnings, this might seem reasonable, but they are not. The state pension in this country in 2016 is £7,500 (I don't know if that includes SERPS or not) and I believe the average earnings figure is £26,500.
In Sweden the maximum state pension is just over £25,000, in Spain 26,630, in Germany £26,366 - only a few thousand below average earnings.
A study by the International Longevity Centre ranked Britain 21st out of 27 countries, and labelled our state pension “one of the least generous in Europe”.
I don't pay tax on my pensions but my husband pays a substantial amount. He does not resent it - he realises he is fortunate to receive enough pension to warrant paying tax. I find it incredible that someone who is comfortably off is so begrudging of those who, usually through no fault of their own, have very little to live on and are now threatened with even less.
I too have great sympathy for younger people, many of whom are really struggling. The answer to this is, in my view, not to make the lives of pensioners even more difficult but to raise the income tax level on high earners, simplify the tax system in order to close tax-dodging loopholes, and to collect tax from companies rather than allow them to dictate how much they are willing to pay. On top of that, some sort rent controls would also be of great assistance to young people.