Sure, if you define "successful" in the most cynical way possible. I don't disagree with you at all that many projects (even many non-space-related) are just jobs programs masquerading as "progress" or "research" or whatever.

But so what? I don't care about that measure of "success". I care about reliable, reusable, cost-efficient space launches, and all the technological and scientific advances that can bring. By those measures, the space shuttle was a disaster of a failure. That's what we care about.