People who use permissive licenses usually don't care about the license-inclusion clause, so most people just don't bother with it until someone comes asking. At the end of the day, fixing that problem is just a matter of including a new text file in the next release. It's nowhere near as big of a deal as when someone complains that you're not complying with the GPL.

By the way, whether you're linking statically or dynamically doesn't affect whether you ought to include the licenses of your dependencies. At least not for BSD, I'm less certain for MIT.