This was more common a decade or so ago. Employers used to offer all sorts of perks to get RNs to work for them (signon bonuses, free childcare, free relocation, loan payoff, etc). Nowadays few employers need to offer anything to recruit nurses for positions -- especially popular tracks. Some continue to offer signon bonuses for hard-to-fill areas (several hospitals near me will do this for First Assist/OR nurses, bariatric specialists, and neuro ICU nurses) but not for med-surg, general ICU or new graduate positions.
Many employers also cut down on the employee tuition benefits in the times when budgets became tighter. Several hospitals in my state will not offer any support for FNP degrees since this means that the nurse will be leaving the in-patient units.
Right now the federal government is offering loan cancellation for those who will become fulltime faculty (the Nurse Faculty Loan Program) or who will become primary care providers (FNP, PMHNP or CNM) in Health Professional Shortage Areas (generally designated rural counties). If you are open to relocation to another state, definitely look at the Nurse Corps Loan Repayment Program (sort of a Peace Corps to work as a nurse in a under-priviledged part of the US).