I don't understand the analogy. Websites that 'always work instantaneously and never have any downtime' is technically infeasible, though you can get closer by pumping more money into the web side of your business. No company deliberately injects downtime into their website, but they do think it may not be the biggest priority, and hence there will be more downtime.
On the other hand, you need to actively look for loopholes, and get access to tax lawyers and accountants in order to do something like a 'double-Irish'. That's not a failure to pump money into your accountancy division in the same way downtime is a failure to pump money into your web division. In fact, it's exactly the opposite - doing a 'double-Irish' would seem to require more money to be pumped into the tax law part of your business.
The equivalent in your analogy would actually be exactly the opposite - if Google hired something like 'downtime lawyers' who would find the optimal way to inject downtime into their website. If Google sought out downtime, and actively pursued downtime.
Pump more money into the web side of your business and you get less downtime. Pump more money into the tax lawyer side of your business and you avoid more taxes. The analogy is bankrupt.
Reality is complicated, but even more complicated than reality is the tasks Google has set its tax lawyers to concoct to avoid paying taxes. I'm sure you yourself have a great many opinions, moral or otherwise, on subjects you don't know the technical intricacies of, but you hold those opinions because of a principle that applies to the base facts of those subjects.
Along the lines of another commenter, I don't need to understand the current debate in moral epistemology and animal rights in order to have good reason to think kicking puppies is immoral, and I need even less knowledge to know that I don't want to see puppy kicking in society. I can dislike puppy-kicking, even if it turns out that puppy kicking is legal, or even moral - and I have a feeling you would too.