My current and previous jobs were with well funded non-IT companies that have an IT arm with their own executive structure. Unfortunately, the company is still shackled by shareholders who have their own ideas and do not understand on one hand, you have a massive company with huge profits. On the other hand you have another area, more nimble that is trying to innovate. Things eventually bleed (or, are bleeding over).

I wish you the best of luck. Not just for your job, but for Walmart. The world needs competition.