It can't, but it doesn't have to be an all-or-nothing thing. A system that is
less corrupt functions more smoothly than one that is
more corrupt, even if there is still corruption.
In the U.S, corruption takes the form of old-boy networks for financial access, exclusive business relationships, under-the-table deals that you'd rather not be made public, close relationships between business and politicians, alumni networks, etc. In many other countries, corruption takes the form of bribes needed to even start a business, hired goons that you have to pay off for protection, unreserved Party loyalty, and midnight executions of people who are deemed a threat. As a startup founder, I get annoyed at all the hoops I have to jump through that have little to do with building a good product, but realistically, I am risking comparatively little and there are ways to convince people that don't involve obsequiousness. Doing something disruptive in, say, sub-Saharan Africa or China or the Philippines often involves much more significant risks to life or property.