You can't enforce strict copyright. I'm saying this as someone who has worked on a lot of commercial software and games, even written copy protection systems of various kinds.
Public: Police services would charge the public far too much for any meaningful enforcement to make it practical - and we're already spending far more than any other nation on rule enforcement systems. It would either be far too spotty to be effective, or be politically impossible for many reasons, at least in a somewhat democratic system.
Private: DRM systems that get invasive enough to be effective (and there haven't been many for very long), will incur a drastic competitive disadvantage to competitors who are less invasive. Longterm strict DRM would not be sustainable for many, many reasons. DRM is in effect asking players to pay a tax in both money (bandwidth/dev costs) and quality (time, inconvenience) that is far, FAR too high for the results. Oh, and it will always break in commercial software to some degree - and be a giant point of failure, the more strict it gets.
Legal: Even with oceans of legal text, and lawsuits constantly popping up - you can't scale anywhere close to the level of "fixing the problem" using the legal system. Physical counterfeiting you can come close - but you can't stop the world from copying music from radio, or any of the thousands of ways copies of stuff can be made with a legal system. Some judges may be accommodating, but to scale to the level you'd need - even the most industry-friendly judge is going to get sick of the game and dance, and the whole thing is going to get shut down just by targeting such a large portion of the populace. Think the drug war is a travesty? A significant war on 'illegal copying' would catch even more in its net.
This system of vaguely increasing 'ISP warnings' followed by inconvenience is about as close to what you can expect to be tolerated. Give the industry the right to issue fines at will, and the backlash (and targeting failures) would be amazing.
Want to make a system that works? Look at Steam. That setup is amazing - promote the games, make it really easy, prioritize a good direct experience, make it easier and better on average than the Pirate Bay experience - and you'll get 70+% of your potential market. I know that 30% you think you're losing hurts in the gut a little - but irritating your customers with DRM will lose you much more over time, and devote a portion of your development setup towards a developer job everyone in the room will hate, taking up large parts of meetings, making everyone uptight about worrying about pirates, making your product worse.
Amazon and and iTunes and such also do a somewhat decent job, and getting into worse areas would be the XBox/Playstation marketplaces and EA's Origin - the sales techniques get more invasive the worse you go, and they get to feel less a good experience than The Pirate Bay as you travel along this road of annoyance.
I like being paid for my work - but I don't find DRM or annoying interfaces (including unnecessary network usage) to be good ways to make a living. People can and most definitely WILL buy software they would otherwise download if it is a good convenient experience, and if the software isn't sabotaged against use. Investing time in sabotaging your sofware is NOT time well spent.