C vs Java (on basis of salary)

I'm a c developer. At times I see that many of my friends are getting paid 1.5 times of what I get paid. Is it a rare case or in general it is applicable? I'm passionate about computer science, in general. To be honest, I also want to get paid more. I don't have problem in learning Java or Go and working in it. Is it a common finding that c developers are being paid less than other modern language developers(even having equal level of work life balance)?