it depends what you define successful as...

the garbage men may have found school to be extremely hard...they may have mental problems...they may have worked hard for a long time just to getthe job of a garbage man...and they may think its the best job in the world...i bet some people are earning millions and millions of pounds a year and not be as happy as they would be, if they were a garbage men...(called bin men here) who had little to no education....
....personally i like learning, i like going to college and do it out of my own choice....and i hope that the work i put into it will pay off one day....

my point is....unknown