As the yearned-for fake privacy walls go up, the only entities that will still have the ability to abuse privacy, will be politically connected corporations and governments.
Germany supposedly has some of the best privacy laws in the world. Their government freely abuses their people with domestic espionage. They'll continue to work with technology businesses to that end as it fits their purposes.
There's a lot of outrage about Facebook. Meanwhile, absolutely nothing has changed, or is going to change, about the NSA spying. Nothing got fixed. More or less the Snowden revelations were entirely meaningless in terms of changing the status quo. The NSA is spying on EU and US citizens just as they were five years ago, just as they will be five years from now. Where's the outrage today about the NSA? Almost everyone gave up, that's why Facebook is the new target, the people couldn't do anything about the government spying.
GDPR creates the haves and have nots when it comes to access to abuse privacy. That's all it will change. If you have the political access (which Palantir does and will), you're going to get the security keys to abuse privacy (the alternative is for EU governments to entirely shut down all domestic espionage, that will never happen).