BS or MS is mostly about learning and the desire to understand it all.

If you truly are talking about employment alone, your time would be much better spent programming (not in school). I am twice as likely to hire someone with 4 years experience as someone who is a fresh grad.

No one in Silicon Valley cares if you have a degree. They care what you can do.

Work for big corporations...they care about a MS, but they will mostly have you managing other software engineers (not coding).

Also consider moving to Europe. They really value the old school of thinking and MS is almost required.