The 175 payrate at RAH is equal to or less than a buck better than AWAC's concessionary 146 payrate once you get beyond the 6th or 7th year. Well, for captains anyway. FOs? Entirely different story.
The 175s are there and it isn't the fault of RAH pilots. What will be the fault of their pilots is if they fail via bargaining to get work rules and hourly rates at or near the top of the industry to fly them, and if they don't pay their FOs at least 60% of captain rates for an airplane that large.