Markus Junianto Sihaloho & Antara – A survey released on Monday shows that Indonesian voters are losing faith in the nation's Islamic political parties.

The executive director of National Survey Institute (LSN), Umar S. Bakry, said the declining popularity of Islamic parties was caused by the parties' overconfidence in their constituents' loyalty.

"From four Islamic parties that are in the House of Representatives, it seems [after the next election] only the Prosperous Justice Party [PKS] will still be in Senayan [the location of the House]," Umar said, as quoted by Antara news agency on Monday.

"Without quick re-evaluation, consolidation and total correction, PAN [National Mandate Party], PKB [National Awakening Party] and PPP [United Development Party] might be ousted from Senayan."

Umar said PKB might be overconfident that members of Indonesia's biggest Islamic organization, Nahdlatul Ulama, were a guaranteed voting base, and that PAN might feel similarly about members of Muhammadiyah. Both parties were founded by leaders of the two respective Islamic civil society groups.

"So, don't be over confident; it cannot be done in modern politics," Umar said, adding that most people don't believe the current slate of Islamic parties are capable of bettering the country's fortunes.

While Golkar Party tops the survey with the favor of 14.4 percent of respondents, the nation's four largest Islamic parties garnered less than 12 percent of votes combined. PKS led the foursome with 4.4 percent of all those polled, and the United Development Party (PPP) fared the worst, winning just 2.2 percent.

Umar said that in addition to taking certain constituent blocs for granted, another problem vexing the parties was their lack of a national figure who sells well. "It might be a classic [reason], but that's the reality," he said.

The survey was conducted from Sept. 10 to 24, with 1,230 respondents from all 33 Indonesian provinces. The polling had a margin of error of plus or minus 2.8 percent.