The Social Democrat/Green budget will be voted on by parliament on December 3rd, but even with the support of the Left Party it will not have a majority in parliament backing it. The four centre-right Alliance parties will also put their shadow budget to parliament, as will the Sweden Democrats.
Should the Sweden Democrats choose to vote down the government's budget, and vote in favour of the opposition Alliance budget, then a difficult parliamentary situation would arise, with the possibility that the government would fall.
Speaking to Swedish Radio News, Left Party leader Sjöstedt says he wants to know what the Alliance parties would do, should their budget get more votes in parliament than the government's.
"They are prepared to cause a huge political mess, a kind of political crisis, but what is strange is that they have no plan on how to run Sweden, and if they are putting forward a budget, them they should be prepared to carry it through and be responsible for it", he says.
But Centre Party leader Annie Lööf rejects the criticism.
"If we win then it is up to Stefan Löfven to solve the problem. He is Prime Minister", she says, and is supported by Anna Kinberg Batra, the favourite to take over leadership of the largest opposition party, the Moderates: "If Löfven doesn't get his budget through parliament, then he has problems that he has to think about, and work out what the path after that is."
The Sweden Democrats have so far refused to say how they will vote on the government and Alliance budgets, saying the decision will be made by MPs the day before the parliament vote.