Is this a good idea for getting rid of leaves?

The other day I noticed that some one had raked their leaves up around the base of a tree, like mulch. I did a double take. My first thought was, “That’s a good idea!”
My second was, “They’re all going to blow away, though…”
My third was, “Well, not if you wrap plastic around them, punch holes in the plastic and, viola! Come spring you have real mulch around your trees!” And you can save the plastic for the next year.
I wrestle every year with the idea of bagging leaves in non-biodegradable plastic bags and dumping them in the landfill.
We have roots showing around our trees, and if that mulch idea worked, in the spring, we could just rake the mulch over the roots. In a few years we’d have no more roots showing. It would be easier, too, than hauling in fill dirt.
It would solve so many problems…if it worked.
What do you guys think?