First, there is no “wrestling”. The policy is clear. Second, the only way to fix declining population is to increase permanent residence, which means either a Permanent Residence Visa or citizenship. But it takes 10 years for Permanent Residence, and Japan bans dual citizenship. Work visas do not fix the problem. But work visas are popular because immigrants can be treated as slave labor.
In other words, the author of that article has done a small amount of research but is actually being far to generous to a xenophobic and racist government that’s enabling the abuse of foreign laborers.