Sounds Idealistic to not charge these taxes and fees they pay for some services that are necessary.
Mexico has had the cheap air fare since the early 80's with no effect on Belize, We offer something entirely different and they offer the cheap air fare in desperation for tourist trade.
The tourist using the mex/air then bus to Belize are just cheap tourist taking advantage of Mexico's desperation.

White Sands Dive Shop
https://whitesandsdiveshop.com/