And if you introduce a voting threshold of 80 because "they're going to die soon anyway", thus ensuring their lifetime of experience is ignored, what stops you deciding that it's now all the fault of 75 year olds? Where does it end?
Your example of the UK gives away the problem. Lots of young people voted in, because they naively believed the predictions of catastrophe and doom that were being announced at max volume by the academic and governmental elites. Older people who perhaps remembered their long history of failed economic forecasting were less worried. Who was right? The older people were - the forecasts that were made in the run up to the referendum have by and large been systematically proven wrong since then, to the extent that senior members of government and business are openly stating the forecasters at the Treasury and Bank of England have no credibility and should be ignored.
Your example of the UK gives away the problem. Lots of young people voted in, because they naively believed the predictions of catastrophe and doom that were being announced at max volume by the academic and governmental elites. Older people who perhaps remembered their long history of failed economic forecasting were less worried. Who was right? The older people were - the forecasts that were made in the run up to the referendum have by and large been systematically proven wrong since then, to the extent that senior members of government and business are openly stating the forecasters at the Treasury and Bank of England have no credibility and should be ignored.