The phrase "are wary to commit" is not correct in standard English; it should be "are wary of committing." You can use it when discussing someone's hesitation or caution about making a commitment or decision.
Example: "Many investors are wary of committing to projects that lack clear potential for success."
Alternatives: "are hesitant to commit" or "are cautious about committing."
All are worthy of consideration, but it must be admitted that all carry dangers for employment, which is why Mr Miliband is so understandably wary to commit.
The Mets are eager to re-sign Pérez but are wary of committing to a contract longer than three years.
Israeli officials are wary of committing to negotiating final status issues before their security concerns are met.
But many German lawmakers are wary of committing to policies that could mean even more payouts in the future, as the country's politicians hunker down ahead of a national election in September.
However, some SPL clubs have told BBC Scotland they are wary of committing to the changes.
Critics add that many retailers, particularly US ones, are wary of committing to a process which could land them with legal obligations.
The plan could face resistance from some in the White House who are wary of committing any additional American forces to a fight against a poorly understood web of extremist groups in North Africa.
Speaking from Labour conference in Brighton, the Labour leader said he wanted tariff-free access to the single market with a close relationship to the EU, but said he was wary of committing to full single market membership, akin to the deal Norway has with the EU, despite a recent poll showing 66% of Labour members back a single market deal.
Old-school media consumers who cling to their cable subscriptions and regular trips to the movie theater may be wary of committing to a monthly Netflix subscription, especially if they don't know the quality of Netflix's original content.
Britain's most senior general, the chief of defence staff, General Sir David Richards, is known to be wary of committing UK forces to any venture that might provoke what it is intended to prevent – a regional conflict.
