Part of the problem with landfill is that the economics are largely 'profit first, cost later'. We don't really have a good model to ensure that long term maint

Part of the problem with landfill is that the economics are largely 'profit first, cost later'. We don't really have a good model to ensure that long term maintenance and care of a landfill site post closure is always adequately funded so there's always a risk that an owner who might well have made all his capital investment back, and more, before the landfill closed just runs out of money and walks away no matter how you provide privately. This is a bit like the issue you have with defined benefit pensions and longevity, only you have less certainty on the costs. Because the potential environmental consequences of just leaving the site unmaintained or poorly looked after are high, in the developed world government almost always ends up providing a backstop to this. This could be described as 'socialised losses and privatised profits' when it gets used, and we would be right to be very wary of this model, even to pay a premium to avoid it.