I try to factor in taxes because you can't spend what Uncle Sugar takes (assuming you live in the us :-) )
You may find that the tax bite is not as high as you are thinking, unless you are taking large distributions. Here is a scenario for "income" of $92,000-
If you are married and your taxable income is $92,000, here is how the tax is calculated:
The first $18,450 is taxed at 10%, so you pay $1,845 on that amount
The next $56,450 is taxed at 15% so you pay $8,467 on that portion
That leaves $17,100 of taxable income, which will be taxed at 25% so you pay $4,275 on that portion.
Total taxes owed would be $14,587.
If you are factoring in SS, I am thinking that only gets taxed up to 85%, so your effective tax rate should be lower than 28-33%, unless and until the government decides to change the tax code- which no one can truly predict.