I'm saying you can justify a near arbitrary amount of acquisitiveness in the name of your kids lifestyles.
Generally I think acquisitiveness is fine as long as it doesn't come at society's expense. But, I also think a lot of benign-seeming acts by acquisitive people come at a subtle significant cost to society; e.g., supporting the repeal of the estate tax.
By "society" should I assume you mean "other people who want my stuff"?
I see nothing unjust about an arbitrary amount of acquisitiveness. I don't think success, or its material reward, are inherently sinful. I do think it's unhealthy to be obsessed with acquisition for its own sake, as opposed to when one has healthy intentions for that which is being acquired; but in any case, that's nothing to do with the collective good to which you refer.
Generally I think acquisitiveness is fine as long as it doesn't come at society's expense. But, I also think a lot of benign-seeming acts by acquisitive people come at a subtle significant cost to society; e.g., supporting the repeal of the estate tax.