Why not? I can get trade discount too.
That is fair enough if you can get trade discount though, as you need that as part of your business costs, if a tradesperson.
But seems unfair that a tradesperson must pay for dumping even a couple bags of building waste, which then the cost has to be passed onto the customer, who potentially could have gone to the local recycling centre for free, bar the price of petrol travelling there.
Just seems an added tax for anyone employing a trade.