You don't need to spend thousands on a lawyer... I wish I lived in your world.
You do. But just not in my part of it. In Sweden if the state prosecutes you, they pay for your defence. No, the money's not unlimited, but substantial enough (as decided by the courts, not the state) i.e. on par with the resources the prosecution has, that there's no market for criminal trial attorneys that charge directly and work outside the system. I can't see how you could run a fair legal system any other way, given the disparate power between on the one hand the whole state, and on the other you.
Also, no juries, instead panels of lay people chosen by the parties of parliament that sit for a fixed term. (And actually thus get some experience and have a support system outside of the courts.)
No, plea bargains, if the state seeks "25-life" it is of course completely disingenuous to come back and say "But just because I'm a bit over worked, I'll settle for 1 year in prison if you confess now and we skip the trial". If the crime merits 25-life that's what's get decided, as it should be. The state should not be in the business of blackmail. (That said, given that you can mount an effective defence without going bankrupt, I doubt that it would have the same devastating effect that it has had in the US.)
And prosecutors are not politicians. I don't know why you would want a politician in that position. Instead they're civil servants. Appointed by politicians that you can hold to answer if the system is not working the way it should.