Just how much money do tech companies shelter from taxes? Quite a lot, according to the Dutch. Newly published Netherlands regulatory filings show that Google shielded €15.9 billion (about $19.2 billion) in 2016 using the popular "Dutch Sandwich" tax trick, saving it about $3.7 billion in taxes. The maneuver involves shifting revenue from an Irish subsidiary to a Dutch firm with no staff, and promptly moving the funds to a Bermuda mailbox owned by another Ireland-listed company. And this practice isn't slowing down -- Google moved 7 percent more cash through this approach in 2016 than it did a year earlier.