^ It can go both ways though. Some academies actually pay more than the going government rate, depending on the teacher. They want to attract the best teachers from "regular" schools and do that by offering a better package.
On the other hand, there can be a lot of hoops to jump through just to get the regular pay, with some heads of academies seemingly using salaries to effectively bully teachers into unrealistic workloads and vastly increased hours.
I'm not sure what to think of it really. On paper, it's good that teachers have to "prove themselves" worthy of their salaries - there are plenty of teachers (usually older it has to be said) floating through and getting paid regardless. Teaching salaries aren't great for the first few years - quite annoyingly really since you'll generally find newer teachers putting more into the job - but if you've been doing it a while, then it's decent.
It's currently incredibly difficult to get rid of a bad teacher; they'd have to do something seriously wrong to get sacked, and even then it could/would be a long process, usually on full pay. The academy system addresses that to an extent. Like I said though, take that system away and you can be left with megolomaniac heads with fewer people to answer to. The perceived decrease in job security will be an issue for most teachers.
A lot of parents will perceive it in a very positive light; teachers should be seen to work for their money. Too many parents seem to see teachers as the enemy though, usually through having a s**t time at school themselves. However, (even more) tired, stressed and unhappy teachers are not going to be working effectively. You wouldn't want a tired and stressed doctor to operate on your kid, but the same courtesy isn't extended to teachers on the whole.
During training, we were basically told not to go for jobs at academies if we could get jobs at government schools because, from a teacher's perspective, they can be very hit and miss. Move from one governement school to the next and your salary would automatically stay the same. Move to an academy and you could have to justify that salary. Admittedly, most academies, that I've heard of at least, don't make it an issue and tend to pay the going rate.
Personally, the idea that all schools will now become academies makes the idea of teaching in the UK even less attractive than it is now. Honestly, I got more job satisfaction from teaching in the UK than I do here - and I was on a permanent contract, unlike the two-year contracts here, meaning my job was very secure - but it was a LOT more work and a LOT more stress for a LOT less money. F**k it, quite frankly.