Do Co-Pays really make sense?

What is the best health insurance you can buy?  Do lower co-pays make it better?  What about the deductible and co-insurance portion?  Oh, that’s right.  Since they never seem to come into play, they don’t matter. 
WRONG!
The old Major Medical plans had a deductible and maybe some co-insurance that included all medical expenses whether inpatient, outpatient, physician office visits, or prescription medications. [...]