The more benefits an employee enjoyed the more they would stay loyal to their masters. Unless they lose their heads, they couldn't betray her.
After all, she had handed them not only a bunch of benefits while they were working but even after they were done serving her family.
Unless they haven't seen the world, they would realize that they couldn't be any more generous master than her.
Of course, the servants understood that there was no master as generous as Su Wan which was why they all bowed their heads and expressed their loyalty they were going to follow Su Wan and her family till the end!
On the other hand the capital,
Su Yiqian had just returned from the courtyard where the Su and the Lin family were staying because she did not want those troublemakers to make things difficult for her, she decided to keep an eye on them. Not only did she hand them money generously but she even promised Su Lan that she would bring her many benefits if she followed after her.