Recruiting...not so much. Retention...somewhat, but for many reasons other than a single identity.
I know many places that struggle with recruitment. They typically pay their people poorly (if at all, such as with volunteer agencies), have a lot of forced OT, and management treats their people like numbers. Most places I know of have 5-10 applicants for every spot they have posted. Now if you are talking about recruiting quality applicants, that's a different story.
And retention, yes, many EMS agencies have a retention issue, often for the same issues listed above.
Raising the bar lowers supply initially, which increases demand, which increases respect/awareness/recruiting/retention/etc. This is a very basic premise, tried and true by other professions....EMS is dragging its feet and focusing on wrong area often.
not to go off on too much of a tangent, but there are two reasons I think this is not the right thing do to. 1) there is no financial incentive to do this. salaries aren't higher for those with degrees, and paying something $10.50 an hour while mandating a 4 year degree causes a conflict with the laws of diminishing returns. You spend so much money on school, but don't make it back in the workforce. 2) is it needed? meaning, will mortality levels go down? can you correlate better patient care with higher education standards in healthcare? Are their any studies that back up this claim?
Increasing education is never a bad thing, however increasing education arbitrarily simply feeds the college/university system, while providing no other benefits other than it makes people feel good. Just like mandating BSN for all new hospital nurses, does it have any difference in patient outcomes compared to being treated by an ASN? or does it just make some lobbying group happy to say that all new hires have bachelors degrees? Then the argument becomes "well everyone has a bachelors degree, it's like the new high school diploma. it no longer makes you special or separates you from the pack. maybe we should push for a masters degree, that will make us more valuable, except we are doing the same job we were doing before bachelors degrees were mandatory."
While i agree that the current uniform shirts very from place to place, i don't know if any one type is the answer. you need to get buy in from the industry as a whole, which can be like herding cats. We have a hard enough time agreeing on what to have for lunch. Although I never could turn down a discussion over a beer....