Yes it's true. But Toyota has a very unique culture in which management are more like coaches, and every single employee on the line is expected to continuously introduce improvements in the assembly line. In such an environment, the employees are highly empowered. So it is natural that they would resist any attempt to prevent direct communication between them and management. When a union takes charge it is legally not permissible for workers to directly talk to management and vice-versa; they have to go through the union.
If the employees were unsatisfied with that arrangement, they would bring the union in. That's the point.
From today's post:
> Firing whistleblowers isn’t just a side-effect of macroeconomic forces, nor is it intrinsic to the function of free markets. It’s evidence of a vein of toxicity running through the company culture. I choose neither to serve nor drink that poison.
In Ontario, Canada, which has a lot of auto plants, there's actually a controlled experiment of sorts that is going on: the unions are in the GM, Ford, and Chrysler plants since forever. Meanwhile they've been trying to get into the Toyota/Lexus plant for a long time and the workers always vote 'no'.
Same industry, same geographic area and culture, different results.
Turns out that if you respect your employees they often respect you back.