Last year was bad enough financially for Sergei and Victoria Titov, both music teachers getting along in years. Her government salary was slashed by one third, and rampant inflation put some basic groceries like eggplant and cucumbers out of reach. Then came Jan. 1, and the abrupt decision by the regional government here in Krasnodar, the capital of Russia’s southern agricultural heartland, to chop transportation subsidies for older Russians, forcing the couple to limit their trolley rides. Indignant and fearing worse amid Russia’s accelerating economic problems, Sergei joined an unauthorized demonstration last week by hundreds of older Russians who gathered under the bronze statue of a Cossack horseman on the main square here and chanted, “Return our benefits!” They were not alone, neither in Krasnodar nor across this vast nation, where illegal protests and wildcat strikes are erupting with increasing frequency by truckers, teachers, factory workers and all sorts of Russians facing steep government cutbacks because of plummeting revenue from oil and gas.