I have never seen any information about the occupations of individual voters nor do I believe any exists except maybe private polls by parties.
No it was a joke. Private sector employees were implied to be a fault for FF remaining in power, so to use the logic, continually pushing for more money under benchmarking to keep pace with house prices, fuelled the bubble.
As I have said above earlier, I don't know what class or type of employee voted for FF, all I do know is that about 38% of the voters did so. There are many different and varied factors which fuelled the bubble to various degrees but I think that is a debate for a different thread.