As for weighting rubbish, it's not entirely a good idea for some.
We live in a council that is very rural by nature and stretches over a vast area.
They only offer paper and cardboard recycling.
Thankfully, we have a car and space to store other items to recycle until we need to do an errand in town and then we take everything else to the recycling centre.
But there are a fair number of elderly people in this council who don't drive.
And if they had to pay for their rubbish by weight, too, well, it wouldn't exactly be fair because the council has very limited recycling collection.