The system as it is now has worked during their boom era, simply because the benefits one receives if you are ready to die for your Kaisha is a comfortable middle class life that allows you to consume and procreate. But since the Plaza Accord and the bubble economy that was mostly caused by it, this old system doesnt work anymore. But noone can change it, even if there is will behind it.
The problem here is also that changes happen in a glacial pace in Japan, because the institutional and bureaucratic inertia is just so crushing. If you watched Ikiru, you would understand what I mean.
Also pic related. The conformist and hierarchical neo-feudal culture that doesnt allow you to speak up against your seniors doesnt exactly help.