I would argue that adding "Ivy" to a resume certainly wont hurt anyone.. and many of the most successful people I know have found a way to do so, even though many of them didn't earn an actual degree at an Ivy..
Having Cornell, Dartmouth, Brown, Yale, Princeton, etc (even Harvard and Columbia) on a resume gets peoples attention.. that cannot be denied... much more so than Wichita State or the University of North Texas, etc..
Most I know that work their way to senior executive status with large firms that didn't originally attend an Ivy end up doing something similar to what
@Red Leg described.. they attend some sort of executive program at one (or several) schools... that combined with their prior education and prior experience (assuming a solid track record of performance) is enough to keep them competitive with the people that attended Tier 1 and Tier 2 universities..
Im a very good example of that actually.. I hold a BS in Education from a fairly pedestrian state school.. I realized about 20 years ago that my military career ending as a company grade officer combined with a BS in Ed from an "average" university simply wasn't allowing me to compete with my peers who were all retired O5's and O6's that had graduate degrees from one of the war colleges, even though I was running circles around them with my performance... So I went back to school and picked up an MBA and followed that up with an MS in Strategic Management (both from pretty "average" schools).. which allowed me to compete and make it into the "executive" ranks in my industry.. but once again at that point I found I was hitting a glass ceiling.. Now my competition was largely O6's and higher, all with masters degrees from a variety of institutions, many with 40+ years of experience between their military and civilian careers.. while I only had about 20 years of related experience.. again, I was out performing my peers.. but that alone didn't get the interviews for the "C Suite"..
So I picked up an executive program at Cornell, and then another one at Wharton and added those to the resume.. That was enough to get the attention of the people I needed to get the attention of and make me marketable..
Since then I have picked up yet another exec program at Cornell.. and have looked hard at another at Harvard.. its no longer about promotion.. Ive reached the top of the ladder and am now the CEO of the firm that I intend on retiring from.. at this point its about networking.. the overwhelming majority of the people that attend these programs are either already sitting in a senior executive role at notable businesses, or are fast tracking to those roles..
And as most everyone understands.. at the senior level in business, it is often much more about who you know than what you know... connections are far more valuable at the top than enhanced fundamental skill sets..