Canon's math has to look like this:
Microadjustment omission value = (price premium of 7D over 60D) x (number of people who choose the 7D over the 60D strictly in order to get microadjustment
Microadjustment omission cost = (cost of warranty repair on lenses that could be corrected with microadjustment) x number of lenses sent in by people who bought the 60D without microadjustment
If the value of omitting microadjustment is greater than the cost, omit microadjustment.
I'm not saying that they SHOULD follow this formula, but looking at it, the majority of 60D owners probably will get it as their sole camera and won't notice the kind of tiny focus errors that microadjustment or warranty repairs would fix. The warranty repair cost is thus pretty low. Then again, plenty of us have out of warranty lenses and won't tolerate minor focus issues, so for us, buying a camera as a second body or backup, microadjustment is very important -- so the microadjustment omission value might well be higher than the cost.
If canon wants to be consumer friendly, they'll add microadjustment. If they want to pad the bottom line, I'm guessing their choice will be to leave it out.
Just my two cents. I really have no idea what process canon actually follows in making these decisions....