The reality is this unfortunately this comes down to ethics in business and some companies cannot help themselves because it becomes ingrained as a culture (not meaning to cast aspersions to all being the same) . When employees are driven by deliver unrealistic expectations or be fired they become desperate and it works its way back up and down the food chain.
The difference also is some actually believe that this is a normal course of business. This is not the first industry to have Asian companies decimate an industry with unscrupulous practices. The US government at the highest level has reprimanded the Chinese for dumping and unethical business practices designed to capture the market, which are geared to destroy any competition even if they have to lose money. While you can say isn't this the goal of every business, the answer is yes. What becomes unfair is when you have an endless pocket of government subsidy standing behind you fueling the fire. Look at the steel industry or solar panels to name a couple which obviously dwarf the security industry.
So the model is you as the OEM validate the market for Hikvision, develop the channel and the customer and then they swoop in and grab the gravy after all the hard work and expense is done. This is nothing unique and should not surprise anyone as it is the same history all over again.
No one should fool themselves into thinking being open with the customer in a competitive market is going to work when everyone is fighting for a point. They will at least if you are providing value added hold you accountable if not hold you hostage by pointing to the prices which he can get from a more than willing manufacturer who sells to anyone, anywhere, anytime.
The market and the industry has become too transparent with sophisticated products that are already a commodity and requiring an advanced level of support. This does not bode well in the long term.
How long before the distribution channels suffer the same fate as the OEMs; my guess is not long. Having hired 100s of people in the US I would suspect there is a grander plan.