If I was making policies I would oblige manufacturers of anything to take back and recycle their product at the end of life. This would make sure products/packagings are made to be recyclable and/or biodegradable.

This should be applied not only to clothing, but really everything. I would expect the first result would be no single use plastics anywhere.

Obviously the cost of the change would be transferred to consumers on the purchase price. However we are already paying it in a deferred manner with the degradation of the natural world.