While appreciating your company's gesture to help the employee tide over a critical personal financial situation, I think you also need to consider the financial condition and size of your company, as well as the long-term consequences of such a policy. Frankly, I haven't seen many companies of similar size go to such extra lengths, as a company policy or practice, to take care of their employees except on a case-to-case or selective basis.
However, as Dinesh and Saswat mentioned, there could be quite a few pitfalls in such policies which, if not addressed from the beginning, are likely to make such a proactive policy more of a bane than a benefit.
A Better Approach
A better approach could be for the company to partner with a financial institution or bank, as the chances of individuals obtaining loans at reasonable interest rates are lower without company involvement. This would also relieve your company from handling the legal paperwork, due diligence, etc. Legal documentation in such matters must be comprehensive, covering all angles and possibilities, one critical aspect being what Dinesh mentioned, 'What if the employee runs away?', which may require adjustments for each case.
In summary, this model ensures the company acts only as a facilitator, akin to an aggregator like Ola, Uber, etc., in the cab/taxi business.
Regards,
TS