if you read the article...

Instead of discarding stock, companies are encouraged to manage their stock more effectively, handle returns, and explore alternatives such as resale, remanufacturing, donations, or reuse.

I guess remanufacturing/reuse might be the intended solution if it's absolutely not to be worn.

Well one link deeper says "Restrict the export of textile waste" but I'm still unclear why they preferred these measure over a carbon tax.

Edit: "To prevent unintended negative consequences for circular business models that involve the sale of products after their preparation for reuse, it should be possible to destroy unsold consumer products that were made available on the market following operations carried out by waste treatment operators in accordance with Directive 2008/98/EC of the European Parliament and of the Council3. In accordance with that Directive, for waste to cease to be waste, a market or demand must exist for the recovered product. In the absence of such a market, it should therefore be possible to destroy the product." This is a rather interesting paragraph which seems to imply you can destroy clothes if truly nobody wants it.