Bid-rigging

In Japan, some industries still have bad custom. Many media recently broadcast when bad customs blow open.
Bid-rigging has been broadcasted frequently.

Last year, the Fair Trad Commission expose criminal business practice of the steel bridge construction industry.
Some executive officer was arrested by what they have done.

This year, air-conditioning unit and civil engieering industry was disclosed their bid-rigging,they have done bad business practice for a long time, for the Deffence Facility Agency's project.
The civil engineering industy was brought their bid-rigging to light about 13 years ago. They have continued that bad custom since then. I think that another industory has bad custom, as like bid-rigging. When will it come to be so clear on every Japanese industry?