What are these white worms in my figs, and how do I prevent them?

We have a Mission fig tree in our backyard and every single fig has been filled with these white maggots/worms. Last year, we discarded a ton of figs. This year, I tried using small organza bags over each fruit, but we still got worms.

What are these?

How do we stop them?

(This fig is a little overripe and dark, but even the ones we harvested early that were still very pink inside had worms.)