Private industry is trying to attract skilled research scientists by offering them high salaries.
Conclusion (So)
(assuming government-employed research scientists motivated by their own interests at least as much as by a sense of public duty), the government is likely to lose its most skilled research scientists to private industry.
Evidence (since)
None of these scientists would have problems finding private-sector jobs. Private industry is trying to attract skilled research scientists by offering them high salaries. Most research scientists employed in private sector jobs earn 50% more than comparably skilled government (public sector) workers.
Evaluate
Our author is essentially thinking that if government research scientists are motivated primarily by their own interests, they will leave their government jobs in order to make 50% more at private sector jobs.
So if we were trying to weaken this argument, we might say,
Maybe what most interests a certain research scientist is colonizing Mars, and she's more convinced that she can impact that quest via the government's infrastructure and funding than via Elon Musk's private sector attempts.
Goal
Essentially, the author is assuming that , so she's concurrently assuming, .