I agree with your wife; "you're a fool for "being with her". You can't make anyone "get help". I wouldn't worry too much about her üsing the gov't for financial gain, they tend to put folks through the ringer and won't help someone who won't follow a Psychiatrists'directions.
If she is BiPolar, it's a rough road ahead, especially for you. If she won't take her meds, the bridge is out, there is no road ahead. Find a lawyer, most offer 1/2 hour free consults and bail. There are plenty of women out there who would like to be married to a caring man like you. Now it's all damage control. Maybe you can get an anullment on the basis of "Fraud". Being BiPolar is a little bit more than just a tidbit she forgot to mention. It sounds like you were duped. Sorry, explore your escape options. Cut your losses and Run. Find yourself a nice widow. They haven't failed at marriage and will be very caring.