The BBC is introducing a wage cap that means the median pay of its top bosses cannot be more than nine times the median wage of staff at the corporation.
Perks for senior staff including private healthcare will be phased out and a freeze on bonuses for the most senior executives will continue.
In a speech in central London, Trust chairman Lord Patten will say the corporation has to "distance itself" from the market and become "sensitive" about how it spends public money.
In the lecture to the Royal Television Society, the former cabinet minister is expected to say licence fee payers do not expect the BBC to pay "sky-high commercial rewards to people that work for a public service".
He will commit the corporation to publishing "a pay multiple" which will compare the median pay of Executive Board members to median pay within the BBC as a whole.
Lord Patten will tell his audience: "We have agreed with the Non-Executive Directors, who decide pay levels for Executive Board members other than the Director General, that we will regard the current multiple in effect as a cap within which executive pay should be managed. Moreover, although of course the BBC must continue to strive to attract and retain outstanding candidates for senior posts, the Trust's intention is that over time this multiple will fall."
The current multiple is nine to one and will in effect enforce a maximum wage system on the corporation, although Lord Patten will say it can be broken in "exceptional circumstances".
A separate multiple will also be published comparing the pay of Director General Mark Thompson to median BBC pay and will work in the same way.
Lord Patten will also warn that Mr Thompson's eventual successor will face "a lower multiple", in effect a pay cut from the current rate of 17 to one.
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He will say: "This action on pay is important. Because the BBC must do right by the licence fee payers who pick up the bill and by all the staff that work throughout the organisation at every level."
