I HAVE BEEN SUMMONED.
As I've said before, people are looking at the dichotomy of the OTD vs. the MOT in the wrong way. The degree, by itself, does not provide instant gratification in the form of more money. If you're doing the same exact job with a higher degree, why should you be entitled to be paid more?
The real reason why people with OTDs generally get paid more than their MOT counterparts is that the OTD degree opens up higher level positions in academia/private practice/administration because there is a particularly heavy focus in OTD programs on administrative function and leadership. By and large, those with an OTD are not planning on working at a SNF in the trenches - they're looking for positions in which their new qualifications and skill set applies to. These positions in nature, pay more - clinical jobs are stymied by being paid through reimbursement for clinical services (minus the implicit, such as the share that your administrators take for themselves, among other things), but management, academic, and leadership jobs are not pidgeonholed by this. However, with great power comes...
I really must state, though - clinical experience is the fuel that makes the OTD vehicle move. There is a lofty sense of your "dream self" that going through school will build for you, but that check is hardly ever able to be cashed as a new grad when you're thrown head first into the reality of entry level jobs, experience-based leadership positions , and the sheer fact by itself that 90% (if not more) of the real, useful, or advanced information you'll ever learn and use is acquired in the field...and often through extended experience. A leader in the therapy world is someone who has knowledge, an expanded skill set, and experience - in fact, TennesseeOT has it perfectly right in the post above me: time and experience will set the knowledge that is acquired with the OTD free on an entirely ascended level.
Don't get me started on entry level doctorates, though. My conjecuture is that OT would have to deeply have a passive death wish to do so.