They've been in business since 1929. You probably knew them as RCA. They've provided support services since then. They provided cinema to the Brits and then moved up, staffing all those things people didn't like to do. And they kept growing, the US, Australia, Singapore. They grew and grew taking over German Army training, Australian hospitals, defense radar units, rail operations. All over the world. And they did it pretty good. And yes they supply over 700 ATC's for the US, since we can't seem to do it. Didn't get your panties in a wad. They're on our side.
None? Have you any good studies? Making sweeping broad generalizations means even one challenge breaks your statement.