Since when are you concerned about how wisely your time is spent?
I can tell you that other people concerned with their time are gonna throw out the resumés over 2 pages.
Lets say we have two identically skilled engineers with exact educational and professional backgrounds.
Engineer #1 has a summary of his education, a list of his technical skills, a list of the programming languages he knows, and a condensed list of his last 5 positions with 2 sentence descriptions each, all condensed into one single page.
Engineer #2 has the same first page, but also has a table of contents on the second page, with 15 further pages of in depth descriptions of his various projects, his depth of knowledge, and his successes. He could have one page dedicated entirely to C+, for example, with a referenced entry in the Table of Contents, where he can talk about his various C+ projects in his professional life and what kind of C+ courses he took in school.
Why should I call up Engineer #1 over Engineer #2? Each has a one page summary I can sort through. Engineer #2 provides the convenience of looking further into his skillset and experience for a comprehensive biography to see if it is applicable to my needs.
If you are arguing on matter of inconvenience of the employer to read 10+ pages, the table of contents provides the convenience they need to find which skills and positions he or she is interested in reading about.