Would be nice to be in such an income bracket - the travel business may have its perks but its not usually in terms of high income. It maybe that living in Europe, and certainly in France, we have access to insurance coverage that is lower than policies in the US. My wife and I have a policy with AVA Assurance that costs around $200 per year for the two of us and covers travel/medical coverage for all our overseas travel - even back to the US where we are both citizens. You can see the details on their website
www.AVA.fr - all in French I'm afraid. It is part of the AIG and they offer 500,000 euro medical coverage, 4,500,000 euro 3rd party, cancellation up to 10,000 euro per year, plus delay, loss of baggage etc etc.
I have no idea if you may find a similar insurance in the US. We have a separate dive and watersports insurance with DAN (although we also recommend DIVE ASSURE) and I believe they also offer a travel/medical supplement to their diver policy. I have not researched this and as that's not my area of expertise, I am not really qualified to comment on that but here is what we will now advise all our clients going to Galapagos.
NEW regulation per 1 MAY 2018: Any person who enters Ecuador as a tourist must be able to present proof of public or private FULL COVERAGE international health insurance for the duration of their stay in Ecuador.
From what we understand this means guests need insurance that covers them for health, in short they need health insurance over and above DAN. However if their DAN policy also entails health insurance then that maybe fine, however please ensure as per the new regulations that guest are able to prove that health insurance is in place when entering Ecuador. We recommend that you contact DAN or your dive insurance provider and ask the if they cover that, and if they do, can they send you something that states that clearly and will be enough for Ecuadorian Immigration.
Will keep you posted when we learn more but if you find a policy for US residents that is close to this, then please let su know.