I'm picky...
FFF is right where I'm concerned. I'm in a well-paid job currently and although I'm prepared to take a large drop in salary to fly full-time, I want something in return. That something would be an employer that can develop my piloting and instructing skills, won't go bust overnight, offers a decent working environment and ideally pays enough to keep the wolf from the door - all year round. Picky? Probably - but I'm serious about a flying career.
Only judging by posts on this site (which may or may not be representative of the general situation!), it seems to me that there are some slightly older 'career changers' looking for a sensible move into aviation and a load of younger folks whose eyes light up only when a jet turbine is mentioned. The former are more likely to consider instructing as an option but they are the smaller group. That, combined with the general movement industry-wide and you get your shortage at GA club level.