So are sanctions going to work?

The term "devastating financial sanctions" comes out of one side of the mouth, while the other side suggests that any sanctions are more likely to cause long term than short term issues. Russia's major export of oil is still thriving as countries like Germany are hedging on whether or not they can buy elsewhere. Other countries not associated with NATO are still openly buying the oil and some western countries are simply being quiet about their transactions with the Russians.  A bipartisan bill in our own Senate that would ban imports of oil from Russia to the United States is opposed by none other than President Biden, who is said to be lobbying hard against it, preferring to keep it in his back pocket as a threat. 

The international banking sanctions can only prevent a select amount of transactions, and we hear now that Russia and China are starting their own alternative to Visa and Mastercard (which ultimately can be done with the banking situation as well). Any Russian oligarch would have likely pulled as much of their resources out of these vulnerable areas long before this invasion took place. While it is probably painful for these billionaires to lose their luxury yachts, it's probably not bankrupting them.  

Make no mistake, sanctions can work over time. But that has to be prefaced by the fact that certain types of ruthless rulers will allow their people to suffer rather than sacrifice their ambitions. To the degree that we know Putin, we might have to prepare for the fact the is probably one of those exceptions will will not care much about the suffering of his people. If we expect sanctions to work, we are talking time. Not days or weeks, but rather months and maybe even years for them to fully take hold. 

So does anyone expect that Ukraine can simply take this sort of bombardment for a time period that works into weeks, months, and even years? If not, then sactions alone are not going to work to end this conflict.