I think a large part of the problem is that Japan is experiencing generational shrinkage. It doesn't matter which way you slice it, when people over the age of

I think a large part of the problem is that Japan is experiencing generational shrinkage. It doesn't matter which way you slice it, when people over the age of 65 make up 1/4 of the population and many need significant care it's going to be impossible to do so without redirecting a sizeable share of their economic output to elderly care. Taxes are just an indirection for directing labour towards social projects so they're not inherently able to overcome constraints like this.