It's always been a total con, but they've kept ignoring it. I was of my old bug bears from my days, but I could barely get an MP to actually comment - especially when the EU launched a directive which basically banned them. But even then no movement from Ofgem, who acknowledged it was more cost prohibitive to those who already used less energy in the main anyway.
Long, but decent read
https://www.ofgem.gov.uk/sites/default/files/docs/2018/09/ideal_economics_response_0.pdf
If you can't be arsed with it all, the Summary and Page 18 onwards are the juicy bits on this when it comes to them knowing it's a rip off AND that any real associated costs (back in 2018) with supply and access to a feed was at least £100 cheaper than ultimately charged.
Obviously naturally related to the green issue though, if the poorer were protected and just didn't see richer folk (who take effectively a discount on comfort by how the system is set up) tell them how to cut costs, more might be willing to do a bit more - especially if they then had greater wriggle room to eat more healthily, as opposed to plastic heavy but perceived cheaper options and so on.
It would save money down the line on an NHS front. Not a total answer, but it would move the dial in more of a joined up way.