It is certainly possible. These days, good assistants go for a premium. UCLA, Washington, Oregon, and USC are all paying top dollar for big time assistants. The SEC pays some of its assistants more then some schools pay their head coaches. Keeping good assistants is huge when it comes to recruiting and continuity. If TG did up the pay, I am glad he did. It shows the school's commitment to the program. When a school will not pay to keep good assistants, it just sends a bad message that the school is not committed to excellence. I think one problem Utah is having is that they are not paying their assistants, and they keep having to rebuild their staff every year. TG has done a good job keeping his staff in place until this year, when Norvell moved on and took a few with him. RR has kept his staff in place for the most part, and those that left this year were really fired instead of voluntarily leaving. RR is going to need a few years with the new defensive staff to really make a difference as it looks like this year is just a year to hold ground. Next year will be the test for the staff, both on the field and in recruiting.
Bottom line, if the school is really committed, then they need to put your money where their mouth is, and both hire and keep top assistants.