Why are green card marriages illegal?

Related questions

1. Can I stay in the US after getting married?
2. What happens when you marry a US citizen?
3. Can you become a citizen through marriage?
4. How much does it cost to file for green card through marriage?
5. Can I get green card if I marry US citizen?
6. Does marrying a green card holder?
7. How can I bring my spouse to USA?
8. Do I need a lawyer for green card through marriage?
9. Can you go to jail for fake marriage?
10. Can you go to jail for a fake marriage?

Tags

1. #through
2. #states
3. #residence
4. #legal
5. #itself
6. #considered
7. #fraudulent
8. #practice
9. #united
10. #marriage
11. #residency
12. #obtaining
13. #crime
14. #participants
15. #purposes
16. #illegal
17. #solely