US definitely were helping to bankrupt... but then just before the putsch in August 1991 USA got really worried that USSR will split in parts, and the nightmare of managing relations with multiple nuclear states led them to support Gorbachev and USSR, until it actually broke. Then the work of gathering all nuclear armaments into one state - Russia - was going on, along with support of Russian scientists (lest them go to places like Iran and help them with their projects). That's one of the big reasons we have ISS now...