How much is enough for wives? Women have a natural inclination to procure and lock down resources, be it money, material, or services. People in general often have a desire to hoard, which might come in handy from time to time (and possibly in the near future). And of course, modern women in general often have a strong sense of entitlement.
Combine all of these together, and the result is often a home-life built around the wife procuring resources, with the husband bearing the brunt of this. Very likely this leads to unhappy husbands, unhappy wives, and unhappy children. This is obviously an unhealthy situation.
The obvious question would be how to avoid this problem. And the follow up question is. “How much is enough?” First consider what the resources are ostensibly for: the welfare of the children. But once above a basic level, the children are pretty much taken care of. Additional resources have a much smaller marginal rate of return with respect to the children’s welfare. If one is rich, then they can and will pay the money required for increased child welfare (e.g. boarding schools, Harvard). But those that are not rich must make decisions. They should decide how best to spend resources, and when done with that, not pine for more. For trying to squeezed every last drop out undoes the good that one is supposedly trying to gain.