Ask HN: Is it worth working two 90% Jobs?

I already work 60hrs/week, but am paid only for the 39hrs.

Would it not make sense for me to work two 30hr jobs instead?

Other than opting out of the 48-hour work week limit, are there any legal or financial concerns to doing this?

I would pay tax twice I suppose, but the takehome would still be better than what I'm doing now, right?