I dunno.
While I would like to help, a convincing case has been made that the Quarian state is not a rational actor, and is just as likely to fuck everyone else over, intentionally or not, in pursuit of it's goals.
The splash radius of some of their actions in canon hit everyone after all.
If you can think of a way to help the Quarian people without freeing up their military resources for them to go antagonize the geth further? Sure.
If you can't, it will probably have to wait until we can attempt to fix the Quarian immune system, or otherwise exercise enough political leverage to prevent them doing something fucking stupid.
Their loyalties are not to you, and their state has foreign policy objectives that are frankly destabilizing.
It's the same problem with hiring Israeli sympathizers in your nuclear program in the 60s and 70s.
Sooner or later nuclear material goes
missing and there's a nuclear arsenal pointed at Moscow and it's allies using plutonium from your nuclear program and weapon designs from your military.
Besides, if it's space stations you want, why do you think the Quarians have especial expertise with them?
They have a talent pool of 17 million on the Fleet, counting the children.
Humanity alone has almost a thousand times that, and that's before looking at the Salarians and Asari et al.
If only 1% of humanity had the engineering expertise, you'd have almost ten times more experts than the entire Quarian fleet population.
For every one like Tali and the other girl, how many other Quarians tried and failed?
Like I said, it's a remarkably callous and cost-ineffective way of gathering intel.
And it presumes that other nations are incompetent or stupid.
Or that if one of those people antagonizes a corporation , they'll let it go instead of hiring death squads or simply lodging complaints with their respective countries' intelligence services and legal systems.
One wonders whether the eviction of the Quarians from that garden planet had anything to do with the previous behavior of Quarians who were believed to be agents of their nation-state.
For one thing, Saren was acting through proxies; shit happens when your proxies fuck up.
For another, it's the Citadel, where even stowaway Quarians like Tali'Zorah can bring mines on to the station and use them in combat without immediately getting C-Sec jumping on her.
The idea that there's some surveillance panopticon picking up things like high radioactivity simply isn't true.
