Can you get a good job in social work with only a bachelor's degree in social work?

You can get a good entry level job. The BSW is still the preferred degree in the the human services because the degree is accredited and the education is well understood. It is also very practical and has a defined internship. Now as with most professional fields the MA is becoming increasingly desired and required. So with a BSW you can get an entry level position - but in general you will want to go back for an MSW if you wish to advance in your career. Now with a BSW you can usually apply for advanced standing to most MSW programs and do your degree in one year rather than two.