I'm in this situation atm and although I love my job, I'm seriously starting to look for something else.
I get why the money is poor; we get school holidays off. But I'd honestly prefer to work holidays and not take the hit to my salary. I know this is part and parcel of working in a school, but I just don't know how anyone who doesn't have maybe a wealthy partner or some other source of wealth can stay for long in the job.
And on another note, if you were a TA/LSA and left due to the money, what did you go on to do?