With the risk of revolt great and the administrative challenge daunting, the ruling class must have realized the importance of a citizen-based military (hoplite phalanx), and they may have been pushed in this direction by the commons who wouldn’t serve without receiving a property allocation. One piece of evidence to support this is found in Aristotle’s Politics.
“When the difference between the rich and poor is too extreme, the situation is particularly apt to be produced by wars. This too happened at Lacedaemon at the time of the second war with the Messenians. The evidence for this is found in Tyrtaios’ poem Eunomia where he says that there were Spartans who were so hard pressed economically by the war that they demanded that the country be carved up into allotments.”