Ukraine doesn't have any money, it needs to borrow it. It can ask the west, but the west gives back a list of conditions to be satisfied (human rights, economical, etc) that are incredibly hard for the governmnet to achieve given deeply rooted corruption on all levels.
There is another source for the money: Russia (which, despite some westerners' beliefs, is a very rich country). In return Russia's demands are to make sure that the deeply rooted corruption on all levels works in Russia's favour. That is much easier to achieve.
Hence the recent $15 billion loan from Putin, that officially appears to be unconditional.
Another point I'd like to make is that many people in the east (I come from one of the big industrial cities in the south-east), don't just dislike Europe and like Russia. It's that their jobs literally depend on Russia, most of the industrial exports go straight to Russia, that's why people there are terrified of any sanctions.