What about people whose businesses failed due to the increased cost of imported goods ? If the increased import costs caused businesses to fail, do they get to sue the US Government for compensation over this? This also has ramifications for other countries - if the tariff's are unlawful doe other countries get to take the US to the World Trade Organisation (WTO) to pursue compensation over the impact the tariff's had on their economies ?
Time to crack the popcorn out and and start watching the fallout!
A more likely objective is the idea that the Government can interfere with Googles business model - an idea that (if the technology works) other Governments may choose to follow. Australia doesn't have the numbers to directly impact on scale, but of these changes have any measurable effect then other countries may choose to use it as an excuse to implement controls on Google - something they will likely want to discourage.
To the landlord belongs the doorknobs.