The scientists don't care where the funding comes from. They just want to do the science. If they do care where it comes from it's called bias and is frowned upon in the peer review stage for the simple reason that it is therefore not as accurate or objective as it should be.

Case in point: the entire debate about childhood vaccinations causing diseases was started by an unscrupulous medical scientist who was paid to find a causal link between a vaccine and a disease by a pharmaceutical company that had a new vaccine to market. It was picked up by the conspiracy theory junkies and now we have kids coming down with polio and whooping cough who should have been protected by vaccinations.