With the honey bee population in decline, it is possible that companies would create an artificial honey to maintain profits. However, there is a huge market for honey substitutes, like agave, that do fill the void. Even with these substitutes, honey prices have increased substantially in recent years, and the profit margin may tempt some producers.
Food-safety specialists in the United States have discovered that the honey being sold may not be real honey. Not only is this ripping off customers for their money, it is also possibly detrimental to our health. Some honey that is imported from Asia was found to have traces of toxins like lead and other dangerous heavy metals.
"Honey laundering" is not a real problem. Just the name itself is comical. So what if honey is not truly one hundred percent honey, most foods people buy in stores is not one hundred percent anything. If one wants to get legitimate honey, get it from a trusted farmer, not China.
While it's totally possible that "honey laundering" is a real problem, I think the bigger issue is that we don't have enough evidence to support it. The studies that claim "honey laundering" are amateur and small. The groups that make these widespread claims need to be challenged to produce much higher quality data to support their claims.