@tom_boy, Ignore @impunity at your own peril. That's a reality. It will be an all weather landing,you better be prepared lest,,,,,.
The wife leaving her job is a great idea,you will have peaceful rewarding evenings devoid of her letting out stress za job.
Discuss with her how life will be like when she leaves her job,the good,the bad and all the in-betweens. It would be a disaster if three months after quitting,she starts whining about boredom or limited finances.
Just keep talking.