It may be referring to this concept of "Binding and Loosing" in Ancient Judaism:
The power of binding and loosing was always claimed by the Pharisees. Under Queen Alexandra, the Pharisees, says Josephus ("B J." i, 5, § 2), "became the administrators of all public affairs so as to be empowered to banish and readmit whom they pleased, as well as to loose and to bind." This does not mean that, as the learned men, they merely decided what, according to the Law, was forbidden or allowed, but that they possessed and exercised the power of tying or untying a thing by the spell of their divine authority, just as they could, by the power vested in them, pronounce and revoke an anathema upon a person. The various schools had the power "to bind and to loose"; that is, to forbid and to permit (Ḥag. 3b); and they could bind any day by declaring it a fast-day (Meg. Ta'an. xxii.; Ta'an. 12a; Yer. Ned. i. 36c, d). This power and authority, vested in the rabbinical body of each age or in the Sanhedrin (see Authority), received its ratification and final sanction from the celestial court of justice (Sifra, Emor, ix.; Mak. 23b).
In other words, them taking scholars/monks as lords besides God may not simply be a question of following a learned person's opinion upon a particular subject, but rather regarding the person as having a power to permit and forbid on others by the "Spell of Divine authority" , as described in the concept of Binding and loosing above. This may explain the hadith mentioned in a poster above about the Jews and Christians following monks and rabbis in what they permitted and prohibited as being a form of worship.
Another relevant historical passage from the Jewish Encyclopedia:
Most of these controversies, recorded from thetime previous to the destruction of the Temple, are but faint echoes of the greater issues between the Pharisaic and Sadducean parties, the latter representing the interests of the Temple, while the former were concerned that the spiritual life of the people should be centered in the Torah and the Synagogue. While the Sadducean priesthood prided itself upon its aristocracy of blood (Sanh. iv. 2; Mid. v. 4; Ket. 25a; Josephus, "Contra Ap." i., § 7), the Pharisees created an aristocracy of learning instead, declaring a bastard who is a student of the Law to be higher in rank than an ignorant high priest (Hor. 13a), and glorying in the fact that their most prominent leaders were descendants of proselytes (Yoma 71b; Sanh. 96b). For the decision of their Scribes, or "Soferim" (Josephus, σοπισταί; N. T., γραμματεἴς), consisting originally of Aaronites, Levites, and common Israelites, they claimed the same authority as for the Biblical law, even in case of error (Sifre, Deut. 153-154); they endowed them with the power to abrogate the Law at times (see Abrogation of Laws), and they went so far as to say that he who transgressed their words deserved death (Ber. 4a). By dint of this authority, claimed to be divine (R. H. 25a), they put the entire calendric system upon a new basis, independent of the priesthood. They took many burdens from the people by claiming for the sage, or scribe, the power of dissolving vows (Ḥag. i. 8; Tosef., i.).