That's because there likely IS no interest in ending it; they're waiting with the assumption that the unions will eventually "give up and shut up", effectively, whether it's right or wrong to do so. Although to a degree, I think it's the right approach, because if they concede every time, how long before they decide their newly increased level of pay is also insufficient?
I think the government have been just waiting for the public to turn on the union and then up the ante with their union busting friends in the press.
Mick Lynch's general popularity and media savvy has prevented a Scargill effect so far. It's a pi$$ing contest though, has been throughout.