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You're right to have fears about your future with the recession and all and I can understand your wife's point also because she feels that she needs to do this to save her marriage since you were on the brink of a divorce because of her actions with sending all of your savings to her family and/or spending it. If you want your wife to keep her job you need to reassure her that you are not seeing someone else and are committed to making your marriage work. Explain to her your fears about your future and that you think the job she has now is more stable than starting a new job with possibly less money. I think if you communicate better why you do not want her to leave her current job I'm sure the two of you can come up with a compromise it's just your wife knows she messed up by sending all of your saving to her family and she now fears losing you because of this.
What you have is a break down in communication where you aren't being very clear about what you want from the marriage and the money situation. I think it's time for you both to sit down and have another talk. Maybe you should also try a Marriage and Budget Counselor, marriage counseling can better help you to communicate and compromise in your marriage and also help you both to better trust the other because you now do not trust your wife with the money of the house and she doesn't trust you not to leave or find someone else. A budget counselor can help you both save money and spend less on needless things and have money for when you really need it.