Earlier quoted context omitted.
It's not the most eloquent phrasing. I think what they're trying to say is "People find legalistic tax-dodging unethical, and they're sick of rich people and big companies getting away with it."
Solution: Get rid of tax law as one of the major sub-industries of the legal profession. When I no longer need a lawyer to submit my taxes, I'll start caring about corporate tax loopholes.
Google advertisers sign contracts with a company in Ireland because Ireland decided to effectively not apply corporation taxes (i.e. use a low rate and allow a variety of schemes that reduce the real rate even further). They did this fully knowingly ... the policy has been popular with voters ... because they wanted to attract international investment and employers to a place that otherwise wouldn't have much to offer, and as a strategy it worked amazingly well. Even during the financial crisis Ireland did not back down on that.
This upset other countries in the EU but none moreso than France which has notoriously high taxes and a notoriously stagnant economy, combined with a population that routinely mounts protests against any attempt at reform.
France is very powerful in the EU and thus instead of trying to make itself competitive has spent the last few years coming up with a variety of political solutions to their competitiveness problem:
• Pressuring low tax jurisdictions to charge more tax
• Getting the VAT rules for online businesses altered so now instead of paying VAT where the sale takes place, you have to pay to the country of the buyer ... woebetide you if you don't speak Hungarian or Croatian. You're gonna have to find someone who does and get them to file a tax return for you.
• Now, apparently, simply harassing rich companies in an attempt to extract more money directly.
Google hires very competent accountants, I seriously doubt they have actually made mistakes or lied on their tax returns. Instead France is going to exploit the existence of a Paris office to try and present Google with a giant bill. This would strongly incentivise Google to simply leave France entirely, I don't think the Paris office is very large compared to the others it has in Europe.