While I agree on your main point, I think that you are confusing marginal tax rate with average tax rate. E.g. the 2017 federal income tax for a single making $300k is in the "$46.6k + 33% in excess of $191k" bracket. This means an average tax of 27.5%. Same for state income tax. So you aren't quite down to $150k/year.
That said, one _does_ face a marginal tax rate of over 50%. So any _additional_ income opportunity is basically cut in half.
On the other hand, an addition expense (but pre-tax) is retirement savings. People in their early-to-mid careers (especially those making $300k/yr) should not be planning for getting anything out of social security.
Certainly you should plan on getting Social Security. There is zero chance Social Security will go away, except in the fever dreams of Paul Ryan, who just retired.
The precise inflation adjusted return you’ll get on this social insurance scheme will be very low, and the retirement age may go up a bit, but unless we get effective immortality in your life time, the US can just pay for Social Security out of general funds.
That said, one _does_ face a marginal tax rate of over 50%. So any _additional_ income opportunity is basically cut in half.
On the other hand, an addition expense (but pre-tax) is retirement savings. People in their early-to-mid careers (especially those making $300k/yr) should not be planning for getting anything out of social security.