Richard's Extravagance

We will ourself in person to this war:
And, for our coffers, with too great a court
And liberal largess, are grown somewhat light,
We are inforced to farm our royal realm;
The revenue whereof shall furnish us
For our affairs in hand: if that come short,
Our substitutes at home shall have blank charters;
Whereto, when they shall know what men are rich,
They shall subscribe them for large sums of gold
And send them after to supply our wants;
For we will make for Ireland presently.

Richard is low on funds, not because he has spent it on wars, as his grandfather did, but as a result of having "too great a court and liberal largess." That is, because he has spent it on himself and on his favorites.

To raise revenues for his war in Ireland, Richard has to resort to oppressive measures. He sells the right to collect taxes and forces loans from the wealthy. If Richard had lived more moderately, it would not have been necessary to oppress his people. If the money had been used productively, that would have been tolerable. But to oppress the people in order to indulge one's own extravagances is a bad practice for a king.