Ineptitude, dishonesty, and conflicts of interest.
I believe that the entitlement mentality looms large in cultures throughout the world. Now more than ever before, too many people think they should get healthcare, food, shelter and all of life's conveniences whether they work for it or not.
The Federal Reserve can print a $100 bill for 3 cents. The difference between the value of 3 cents and $100 is an honor system. The difference in value is the trust that we place in one another that goods, work, ingenuity, creativity, or intelligence will be brought to the negotiation table. Which leads me to ineptitude. When people lose sight of the work ethic or the value of money, they thing of work as something that they are forced to do. All personal accountability goes out the window. I can't tell you the number of times I have worked with contractors, brokers, people at city hall, ect. and if doing a good job takes 5 minutes, and doing a bad job takes 4 minutes and 59 seconds, they would rather do a bad job. If they have a choice between taking 10 minutes out of their day to help me, or 20 minutes out of their day to explain why they can't help me, they would rather yammer on at the mouth for 20 minutes.
I like to deal with liars. It helps remind me of the tactics that they use so that I'm not duped when there is real money on the table. "Well if you don't believe me, you can check with blah blah blah..." I don't have to check, a habitually honest person would not protest that much. It's sad but true, you really need to be a skeptic with every dollar that you spend because it seems that there is no shortage of people who try to sell you things that you don't need, or simply skim your money out of a deal (like an insurance agent). Prospective tenants will tell all kinds of stories as to why they have 10 credit cards, all of which are run up to the limit, and none of which are current, or why they ended up getting evicted from their last apartment.
Do we have the cure for cancer? If we did, would pharmaceutical companies cover it up so they wouldn't lose chemotherapy revenues? Everyone has heard that oil companies don't want us to develop alternative sources of energy because of the astronomical amounts of revenue and profit that they stand to lose. Conflicts of interest present one of the biggest stumbling blocks to progress. The real estate agent who wants you to buy a property has a conflict of interest since they'll get a commission. Many contractors get kickbacks from material suppliers for moving product. Insurance agents get commissions for premiums. The higher the premium, the more the agent makes. Financial planners get commissions for some of the products that they sell. This is more than a situation of buyer beware; it's one of the biggest challenges you will have to face in business.