There may be politically powerful voices which speak out on issues such as these, but only briefly. Tomorrow will be a new crisis, or celebrity death, or something which takes attention away. And because the politicians voicing support for change are in the minority, and support for their efforts non-existent, then there is no momentum to push it forward beyond the crisis of the week.
This has been true for as long as I can remember. I have never seen evidence, current or historical, that gives evidence otherwise. Instead, voters are blamed, blamed for a system they have little to no power to affect in any significant way.