In my experience, the easiest way to earn more is to work as a contractor. You can charge more, have more control over your time, get raises more often and go on holiday more often (every 6 months).
Not sure where you got that number from, but getting about that much after a few years of experience is not very hard at all. I've only worked for a daily rate, never hourly. I'm based in the UK where a senior developer can get contracts upwards of £600 per day pretty easily.
Now with remote work being the standard, you can get much more if you work for good US companies.
I made a whole video series about getting into contracting. This first one lays out my take on why you should consider it - https://learnetto.com/tutorials/why-should-you-become-a-cont...