As a result, ideological biases are important to flag, and studies possibly affected by bias need to be replicated and cross checked.
There is? I would seem that the effects could simply be drawn from real world results in any other developed nation.
How about "Anti-abortion activist doctor releases study showing that abortion in unhealthy." Are you telling me you wouldn't place the study under extreme scrutiny? When someone shows their ideological bias, and it happens to be extreme (yes, socialism is extreme), and then they also do science in the same field, it is absolutely appropriate to make their biases known and subject them to extra scrutiny.
EDIT>> Just saw your note that you agree about raising awareness to biases. It sounds like we agree on that.
Humans trade don't need theoretical underpinning to trade goods and services with each other. They have done it since the dawn of time. Even monkeys do it. I'll scratch yours if you'll scratch mine. And indeed it percolates down to the personal as well, as Eric Berne noted in Games People Play.
You may not have meant it this way, but that sentence implies you have already dismissed any point he makes purely based on what he believes in. Without any evidence, you've implied that any conclusions the author makes are automatically devalued because he will be incapable to undertaking objective research.
Would you write a similar sentence about say a medical researcher? 'Researcher is a member of the medical industry and is very clearly biased toward proving vaccines are safe and necessary'.
(Note: I think it's very important to be aware of influences and biases in hearing opinions - an important part of critical evaluation. Your comment does that for the most part ... it's just the last sentence I have an objection to)