The phrase "a system to which" is correct and usable in written English.
It can be used when referring to a specific system and indicating a relationship or connection to it.
Example: "The researchers developed a system to which all data inputs are directed for analysis."
Alternatives: "a system that" or "a system in which".
How can trans people change a system to which we don't even have access?
Public enthusiasm for the EU is shaky across the continent and Theresa May's position is weakened every time a British politician appears to relish the decline of a system to which her negotiating counterparts are emotionally and strategically wedded.
"How can trans people change a system to which we don't even have access?" Read the full essay: I am a transgender woman and the government is denying my civil rights.
After 22 years of supervisory service in the public high schools, including three years as a principal, I chose to leave a system to which I had given my total commitment.
Rather than finance pensions through a system to which workers, employers and the government all contributed, millions of people began to pay 10percentt of their salaries to private investment accounts that they controlled.
In Chile, Private Accounts For Pensions Fall Short Rather than finance pensions through a system to which workers, employers and the government contribute, Chile has a program in which people pay 10percentt of their salaries to investment accounts under their control.
To fill those new slots, the state instituted a lottery system to which roughly 90,000 people applied.
A Horizontal Control Survey creates a master coordinate system to which other surveys refer.
Why should they be allowed to use a separate legal system, to which the rest of us have no access?
Talk not of the continuance of such a childish and wicked system, a system to which there was no parallel in any age or nation.
The key is creating a system to decide which employees to listen to and whom to ignore.
