The GRC scheme has also been criticized for raising the bar for the opposition in elections. First, opposition parties may find it harder to find competent candidates, including minority candidates, to form teams to contest GRCs. Goh Chok Tong has acknowledged that the GRC scheme benefits the PAP as they can put together stronger teams. With the GRC system the threshold for votes for the opposition is also increased, and opposition parties have to take a gamble and commit huge proportions of their resources to contest GRCs. Each candidate in a GRC is required to deposit a sum equal to 8% of the total allowances payable to an MP in the calendar year preceding the election, rounded to the nearest S$500. At the 2011 general election, the deposit was $16,000. Unsuccessful candidates have their deposits forfeited if they do not receive at least one-eighth of the total number of votes polled in the GRC. Critics have noted that the number of walkovers has generally increased since the introduction of GRCs. To date, only one opposition party, the Workers' Party, has won GRCs: Aljunied, in the 2011 general election, and Sengkang, in the 2020 general election.