re: Breaking Bad Plothole

Answer to the plothole - Gus' intent was to train Gale and kill Walter from day one. Walter figured that out pretty quickly and got Jesse to kill Gale and pulled his weight to make them both less expendable. That's why Jesse's 91-95% suddenly became more valuable. It was Gus' only play that the time. And if you recall, the Mexican play was to get back at Walter.

Walter was the one putting everything on the line for Jesse because he viewed him as the "non-contaminated" son he always wanted (this reinforces Walter's character flaw for perfection and subtly reveals how he truly felt about Jr.)