We don't though... we've simply inherited a terrible system of democracy that shouldn't actually require the aristocracy or monarchy to function effectively, and that in turn has left us with a two party slanging match that gets to broadly ignore a massive part of the population and do what they want. Those in power aren't interested in adapting what works unless it serves to keep them in power, and the people aren't demanding it because the general ineffectiveness of it all has left too many either apathetic to it all, or sat in the smug position of being on the winning 'side'.
As for the topic, @Micky856789 who is the progressive minority of which you speak?