Your numbers are a bit misleading. For example the 75K limit for Child Care Credit applies only if you file as single or head of household. If you file as joint married the Child Care Credit starts phasing away at $110K AGI. From what I understand, correct me if I'm wrong, AGI is post 401K contributions, at that income range the couple could and really should max out their 401K's anyway, meaning they can make $146K per year while maxing out their 401K's before the child income credit starts phasing away.
As far as your other post with detailed budget goes, while it may not be rich life, it's looks pretty good to me. 6% to 401K (not enough at that income level IMO, but that's a separate issue) and 500 per month in IRA works out to be about $14000 squirelled away into dedicated retirement savings, $400 per month on entertainment sounds really nice to me, car payments would imply that the couple either perpetually leases brand new cars every 3 years, or buys new ones every 5, having 3-5 year old car again sounds good to me considering the average car age is currently 11.5 years old, and after all of that they still have 2K disposable income? As I said, the couple may not be independantly wealthy, but what you're describing is a pretty damn comfortable life, far far better than most of the country.