1. Replace the judges and examiners with computer scientists
2. Convince the judges and examiners to switch to the computer scientists' definition
3. Change the law so that the (broken) opinion of the judges and examiners doesn't matter
#1: Isn't realistic. (That is to say, pursuing this goal isn't an efficient use of our limited resources.)
#2: This is where "software is math" fits in, but we've been making this argument for years when submitting amicus briefs and responding to patent office consultations. Still might work, and we'll keep trying, but the Supreme Court is our best hope and they've been pretty reluctant to take a stand. And if we win in the Supreme Court but haven't built any support in Congress, the megacorps will rush through some legislation.
#3: This is where RMS's suggestion fits in. We've done a lot of work on this in other countries but very little in the US. People say it's impossible in the US, but the hard truth is that it's the only way to really win.