(CNN) -- Billionaire Saudi Prince Alwaleed bin Talal has reiterated his support for giving women the right to drive in Saudi Arabia, announcing via Twitter that it would help the economy and reduce the number of foreign workers there.
"The question of women driving will result in being able to dispense with at least 500,000 (foreign) drivers, in addition to the social and economic benefits," he tweeted Sunday.
In the deeply conservative kingdom, women are prohibited from driving, and many must rely on foreign drivers for transportation.
Women's rights activist Wajeha Al-Huwaider said Monday that she was glad to hear bin Talal's comments, but she didn't think it would amount to much.
"We got used to him saying the right things but nothing happens," she said. "I think he only makes headlines, but then nothing happens."
Al-Huwaider said that while she found it interesting that bin Talal put the issue in terms of how much it was costing the country, she has "stopped following any news reports about women driving" until she hears it addressed by Abdullah.
Saudi Arabia is home to around 9 million foreign workers. In recent weeks, thousands of them have been deported in a crackdown by authorities against illegal immigrants.
Last week, Saudi King Abdullah granted foreigners working there illegally a three-month grace period in order to legalize their status.
Bin Talal, one of the richest men in the world, is the nephew of Abdullah and is considered by some to be a champion of women's rights and empowerment.
Last year, his wife, Princess Ameerah al-Taweel, made headlines on the same issue when she spoke out, saying driving laws there should be reformed.
"I think it's a very easy decision," she told CNN's Christiane Amanpour last September. "And it is for the government. A lot of people are saying this is a social issue. ... Education was a social issue. And a lot of people in Saudi Arabia were against women getting educated. Yet the decision was made."
There are no specific traffic laws that make it illegal for women to drive in Saudi Arabia. However, religious edicts are often interpreted as prohibiting female drivers. Such edicts also prevent women from opening bank accounts, obtaining passports or even going to school without the presence of a male guardian.
In 2011, a group called Women2Drive began a campaign demanding that women be given the right to drive in Saudi Arabia.
The movement was sparked by the arrest that year of Manal al-Sharif, a Saudi technology consultant and mother who was detained for nine days for driving her own car. Many of her supporters posted videos and pictures of themselves online driving in various Saudi cities.