Pretty much no other industry obsesses as the IT industry over things like job interview process, salary comparison and compensation.

Also, I take it very cautious when switching jobs. Google says that missing on a good hire is better proceeding with a bad hire. Similarly, I prefer to apply to and interview with a few companies at the time, and do my best at making sure I'm making a good choice. I'd prefer to miss on a good company that to end up in a shitty one.

IT is not body rental, I would actually be suspicious of a company hiring me too fast: why are they so desperate? What did drove them to such desperation? Did the previous people leave? Why? Is that bad technology? Bad management? Company-wide unwillingness to fix long-standing problems?

The challenge is not the time to apply, but the time to do the coding tests and phone tests and onsite interviews. Days for each company, which doesn't scale.

Consider that if you make applying more streamlined, you will actively hurt the chances to get a job. You want it to be one click, like linkedin? Guess what, companies are flooded by applications, hundreds -if not thousands- of applications from anyone and anything, it's just one click, so easy to apply. It's totally unmanageable to review so they're never read. Remember that there has to be human on the other side to review resumes and schedule phone calls.