In May 2010, Cable insisted the coalition government was not split over planned increases to non-business Capital Gains Tax, which some thought would raise taxes on sales of second homes by 40% or 50%. Senior Conservative MPs attacked the rise as a tax on the middle-classes and a betrayal of Conservative values. Cable said that it was a "key" part of the coalition deal and there was no disagreement over it between the coalition partners. Cable said the changes to Capital Gains Tax would help to fulfill the Lib Dem aim of bringing more "fairness" to the tax system: "It's very important that we have wealth taxed in the same way as income." He continued,