* Lack of reforms threaten to undermine catch-up with West
* Poland, Czech least exposed, Baltics, Hungary vulnerable
* High social costs, bad budget structures call for reform
By Krisztina Than
BUDAPEST, Dec 17 (Reuters) - Inflexible budgets, looming elections and persistent economic woes could sap reforms in the European Union's eastern wing next year, undermining growth in some and pushing others towards a Greek-style debt trap.
Few of the 10 ex-communist states that joined the EU since 2004 have seen public deficits spike to the levels of more developed economies like Britain, Greece or Ireland. But for the most part they have neither the protective umbrella of the euro nor super-low borrowing costs to break their fall if they slip.
Volatile currencies and a thirst for investment to fuel the economic catch-up after four decades of communism have exposed the region to sudden shifts in market sentiment, even as many governments try to buckle down and attract funding.
The problems vary widely from place to place, and investors who once saw the region of 100 million people as a homogeneous "emerging Europe" bloc converging with the more affluent West are now picking apart public books for signs of sustainability.
Expectations the region will manage generally better growth than Western Europe and bigger returns on investment still make it an attractive bet for investors, but even after years of reform and their drive into the EU there are substantial risks.
One big threat is a retreat into populism ahead of 2010 elections that could delay reforms to pension systems, social spending and state administrations and cause higher deficits in the short term.
High welfare costs and rigid budgets across the region lock in a big proportion of spending, handcuffing policymakers' efforts to lower budget deficits and cut debt.
"There have been some reforms but no country has attempted a wholesale reform of public finances," said Zsolt Papp, an economist at KBC in London. "Failure to implement any kind of reform would eventually lead to a Greece-type scenario, ie. some countries falling into a debt-trap."
Greece is scrambling to reassure investors by promising steep deficit cuts after ratings agencies Fitch and Standard and Poor's downgraded its debt below A grade this month.
DIFFERENTIATION
In central Europe, building cranes have fallen silent as industry suffers and unemployment rises, and workers are snapping shut their purses despite glimmers of recovery.
No country is expected to show growth of much more than 2 percent in 2010 -- a far cry of the 4-5 percent plus seen during this decade's boom. That has undermined government efforts to jump-start budget revenues and keep deficits from rising.
Whether it is the Czechs' unreformed pension system or a public sector that accounts for a third of all jobs in Romania, the region is still carrying much of the baggage that has plagued public finances since the fall of communism.
Many politicians recognise that cutting in the public sector is the key to boosting long-term growth, but analysts say they may try to ease the pain of their austerity-weary populations instead.
"We remain hopeful that the current crisis will act as a spur to reform," said Neil Shearing, analyst at Capital Economics in a note. "But a retreat to populism would obviously be a major setback to the region's growth prospects."
Hungary, the first country in the region to be forced to seek an International Monetary Fund rescue last year, has made progress, cutting huge pension costs and public spending.
But it still needs to reform debt-ridden state transport firms and oversized local government and take steps to boost its very low employment rate.
With the help of the IMF, it is on track to produce one of the EU's smallest deficits in 2009, at 3.9 percent of GDP.
But the main opposition party, the centre-right Fidesz, has said it will cut taxes and the shortfall could come in at 7.0-7.5 percent of GDP if, as expected, it wins an election due in April or May. [
]Countries with higher growth prospects such as the Czech Republic or Poland are seen better placed to overcome budgetary problems than Hungary, the Baltics or Romania.
But even best-off Poland -- the only EU state to avoid recession this year -- is struggling to lure investors to a 37 billion zloty ($12.65 billion) privatisation programme. That is vital to rein in its widening budget gap and avoid triggering constitutionally fixed debt levels that would force painful fiscal cuts if breached.
"The need to improve their business environments and guard macro-economic stability is bigger than at a time when there was plenty of global liquidity," said Katinka Barysch, deputy director of the Centre for European Reform.
East European countries may be less indebted but they mostly still face higher financing costs than Greece, Ireland and Britain. Hungary pays yields of 7.5 percent on its 10-year bonds and Romania 10 percent on its 5-year bonds, versus around 3-4 percent in the euro zone.
ELECTION THREAT
Political pressure across the region has downed governments in Latvia, Hungary and the Czech Republic this year, and more could fall as voters rebel against belt-tightening and ruling coalitions fall apart.
Manoeuvring ahead of elections due in Hungary, the Czech Republic, Latvia, Poland and Slovakia next year [
] has heightened investor concerns that politicians will slam the brakes on reforms.That happened ahead of Romania's presidential vote this month, when a political crisis downed a centre-left government, derailed the 2010 budget and threatened its IMF aid deal.
Bucharest and Riga have renegotiated budget deficits agreed with the IMF, as has Budapest.
And last week the Czech parliament approved a 2010 budget prepared by a government of technocrats only after the main leftist party pushed through more spending with an eye on an election next year. [
]"Now that the worst of the crisis seems to be over, there may well be a heightened risk that people will flock to politicians... who promise them secure jobs and better social benefits without explaining how that could be combined with much-needed restructuring and fiscal austerity," Barysch said.