The decision to enter a coalition government with Labour was controversial at the time. British politicians were unaccustomed to coalition politics, and the Liberal Democrats came under fire from Conservative and SNP opponents who claimed they had 'sold out' their principles. Key to this criticism was the Labour policy of making students pay tuition fees, which the Liberal Democrats had promised to abolish as their price of entering a coalition, but which became merely the subject of an inquiry as the coalition was formed.