I can't speak to finding part-time gigs but outside the US, it is common for contractors to earn multiples in the order of 2-4x the equivalent employee salary.

I can't speak to finding part-time gigs but outside the US, it is common for contractors to earn multiples in the order of 2-4x the equivalent employee salary. Monetarily, it's almost always worth it to make the jump to contracting if you have the ability and choice to.