Fernanjet, I think your logic here is somewhat off the mark.
Most easyJet passengers don't give a stuff about the on-board service. It is not the reason why they choose to fly easyJet. The more important factor is whether removing a crew member will impact on in-flight sales revenues by more than the cost saving of the crew member's salary.
If the commission earned by the crew is then divided by three instead of divided by four, each of the remaining crew members then gets a direct incentive as a result of the reduction. Most people don't mind working harder if they get paid more.
Coupled to that, word from the easyJet crews is that they are again struggling to recruit enough cabin crew at larger bases like LGW. On some recent flights, I have suspected that the seniors would have preferred to operate with three capable crew members given their openly apparent exasperation with what seems to be a small but increasing minority of scruffy, couldn't-care-less, or downright disinterested crew members now appearing on line ostensibly to make up the numbers.