But western governments don't set the oil price! There's this thing called capitalism. Private firms buy oil, refine it, & sell it. Many of their suppliers are state-owned firms, but they're not western, in the sense you mean (oil producers in Europe & North America are private firms), & the biggest group of governments controlling state firms has failed to reach agreement on demanding a higher price.There's a war in Syria, and Iraq, Libya is still unstable, and while economies are slowing down, they're not in active recession. Demand for oil, in absolute numbers, should still be increasing. So I do think it's a deliberate policy. The timing is just too perfect..
The west is not Russia. It works differently.
Read the financial & trade press. The talk is of producers undercutting each other, desperate for sales, because new capacity has come on line faster than consumption has gone up. Remember that the former biggest importer has replaced a large proportion of its imports with domestic production of oil & gas, thus taking a lot of demand out of the international market.